Harbor Hill Estate & Gate House - Roslyn

Among the largest estates on Long Island was the Renaissance –style mansion known as Harbor Hill designed in 1899 by Stanford White and built in 1900 to 1902 for Clarence H. Mackay and his wife Katherine. The 576-acre estate was located atop the highest point in the area overlooking the village of Roslyn and Hempstead Harbor.

This country home estate was divided into formal gardens and terraces surrounding the main house and a 70-acre farm. With Clarence Mackay’s death in 1938, the estate was left to his son John Mackay III. Due to vandalism during the World War II, the mansion was demolished in 1947. The property was sold in the late 1950s and became the Country Estates housing development.

The Mackay Estate Gate Lodge was built in 1900-1902 as a component of the estate. The still-standing gate lodge was designed as a miniature version of the main house. Both the main house and the gate lodge were designed in French Baroque style with stone walls and steep roof slopes. 

The Mackay Estate Gate Lodge is one of only three buildings still standing from the Mackay Harbor Hill Estate (Dairyman’s Cottage and the John Mackay III Stonehouse). On April 12, 1991, the Mackay Estate Gate Lodge was listed on the New York State and National Register of Historic Places.

From approximately 1970 to 2008, the Mackay Estate Gate Lodge was used as the Country Estates Swim Club. The Mackay Estate Gate Lodge and surrounding 3.2-acre property was sold to G.A.D. Development in 2009. With the assistance of then town historian Howard Kroplick, G.A.D Development considered transferring the gate lodge property either to the Town of North Hempstead or the Village of East Hills. On September 3, 2017, the Village of East Hills decided to acquire the Mackay Estate Gate Lodge. 

When a subdivision was approved by Nassau County, the deed to the gate lodge was transferred to the Village of East Hills in December 2021. With the guidance of the Roslyn Landmark Society, the restoration of the Mackay Estate Gate Lodge began on January 25, 2022.

Sources: 

“Harbor Hill Estate.” Roslyn Landmark Society, 1 Jan. 1967, www.roslynlandmarks.org/profiles/harbor-hill-estate. 

 “Harbor Hill Gate Lodge.” Roslyn Landmark Society, 1 Jan. 1969, www.roslynlandmarks.org/profiles/harbor-hill-gate-house. 

Carrington House - Fire island

The Carrington House is located on a tract of land between Fire island Pines and Cherry Grove. It is one of the earliest homes built on Fire Island, originally constructed in 1912 by Frederick Marquat, and purchased in 1927 by theater director Frank Carrington, co-founder of the Paper Mill playhouse. The house was built in 1909 by Frederick Marquat, a US Army Corporal that served with Carrington’s father, Major Frank Carrington.

The two families used this retreat until 1927, at which point Frank bought the property and turned the space into a nexus for the cultural development of mid-century arts. At the time, the cottage was a rectangular, three bay bungalow. Carrington made two wood-frame additions around 1940. Frank Carrington expanded the property with the “Lone Hill Cottage” built in 1948. Carrington was active in the growing arts community of Cherry Grove. He rented the property to his friends in the community, including Truman Capote. In 1957, Capote developed a novella there that would become Breakfast at Tiffany's.

At one point Frank Carrington was offered $1.5M for the property by a real estate developer but was more interested in preserving the site, so sold it to the National Park Service in 1969 for approximately $300,000 and continued living there until 1975. National Park Service Ranger Bob Freda lived there for the next twenty years. The Carrington House is probably the oldest surviving building in Cherry Grove.

 In 2016, the property was placed on the National Registry of Historic Places.

 

Sources:

“Carrington House.” Wikipedia, Wikimedia Foundation, 1 June 2025, en.wikipedia.org/wiki/Carrington_House

 

Hildebrandt, Bill. “The History of Fire Island’s Carrington House.” Fire Island Pines Historical Society, Fire Island Pines Historical Society, 11 Jan. 2026, www.pineshistory.org/the-archives/the-history-of-fire-islands-carrington-house

Childs Frick Estate/Nassau County Museum of Art

 In 1900, Lloyd Stephens Bryce purchased poet William Cullen Bryant’s Upland Farm and commissioned the architect Ogden Codman to design a neo-Georgian mansion on an elevated site overlooking Hempstead Harbor for he and his wife Edith. The Georgian-Revival house was laid out on Palladian lines with a three-story central block attached by two single story arcades to a pair of two-story pavilions set forward from the main house. Codman added his trademark preference - arched windows. Next to the house, Codman laid out parterre gardens and the rich lawn bordered by woodland gradually sloped down to the water.

In 1919, Henry Clay Frick, co-founder of US Steel Corporation, purchased Bryce House. He unfortunately died shortly after, so his son Childs and wife Frances Frick got possession of the house. They hired British architect Sir Charles Carrick Allom to redesign the facade as well as the interior of their new home, which they named Clayton after Childs’s childhood home. 

Childs Frick was an avid sportsman and lover of the outdoors. At Clayton, he and his family enjoyed swimming, tennis, polo, golf, and skiing on his estate, which included two tennis courts (one grass and one clay), a polo field, two ponds for skating and canoeing, a shooting range, a swimming pool, bridle paths, and a ski slope with its own snow making machine. The family’s love of animals and the outdoors included a large animal zoo with a bear pit, snakes, and an alligator, an aviary, a monkey house, and otters in a pond. 

Frances and Childs Frick lived at Clayton with their children, Adelaide, Frances, Martha and Henry for almost 50 years. Four years after Childs Frick died, the estate was purchased by Nassau County to establish the Nassau County Museum of Fine Art in 1969.

In 1989, the Museum became a private not-for-profit institution, governed and funded by its own board of trustees. A major exterior restoration of the historic mansion was undertaken and the mansion was then renamed the Arnold and Joan Saltzman Fine Arts Building.

A sculpture park was begun in 1989 and became one of the largest publicly-accessible sculpture parks in the Northeast.

Sources:

“Clayton.” American Aristocracy, americanaristocracy.com/houses/clayton-1. Accessed 5 Jan. 2026

“History.” Nassau County Museum of Art, nassaumuseum.org/history/. Accessed 5 Jan. 2026

William Sydney Mount House

American painter William Sidney Mount created some of his most memorable scenes from inside an attic studio at this large, rambling 18th century homestead. Located at the intersection of North Country Road in Stony Brook, Mount’s ancestral family home, the Hawkins-Mount House, was built around 1725, and substantially enlarged over the centuries. 

Mount, his mother, and his four siblings moved to the house in 1814. The barn and outbuildings at the back of the property also featured prominently in his genre work. Living year-round in the house by 1847, Mount had a skylight installed in the ceiling of his garret studio to improve the lighting. 

It is a 2 1/2-story wood-frame structure, with a gabled roof and shingled exterior. The main entrance is sheltered by a shed-roof porch and has a four-light transom window. The interior of the house has more than twenty rooms. The most notable of these is its original kitchen, which has been restored. The oldest part of the house is the left side of the main building. It was built in 1725 by Eleazer Hawkins. He was William Sidney Mount's grandfather. Mr. Hawkins built it as an "ordinary," which was like a tavern or inn. Travelers could stop there for food and a place to stay. The kitchen from this old tavern is still preserved today.

The house remained in family hands until just after World War I and was listed on the National Register of Historic Places in 1966. The house is now owned by the Long Island Museum and is occasionally opened for tours.

Sources:

“William Sidney Mount House Facts for Kids.” Kiddle, 17 Oct. 2025, kids.kiddle.co/William_Sidney_Mount_House

“William Sidney Mount House.” Historic Artists’ Sites of Long Island, www.lihistoricartistssites.org/detail/william-sidney-mount-house. Accessed 27 Dec. 2025

“William Sidney Mount House.” Wikipedia, Wikimedia Foundation, 5 July 2025, en.wikipedia.org/wiki/William_Sidney_Mount_House

Fort Franklin

 The British presence in Suffolk County during the Revolutionary War was anchored by Fort Franklin, located in Lloyd’s Neck. Named for Benjamin Franklin’s son, William Franklin, the fort controlled access from Long Island Sound into the waters of Oyster Bay and Cold Spring Harbor. Additionally, the fort’s garrison and guns, along with satellite encampments, provided protection for Tory raiders.

When it was established in 1778, the post was garrisoned by the third battalion of General Oliver DeLancey’s Tory regiment who remained there until 1780. In 1781, the Associated Loyalists, made it their base of operations.

The stronghold became an important element in General William Tryon’s raids on Connecticut coastal town in July 1779. On the evening of September 5, 1779, Major Benjamin Tallmadge embarked with a force of 130 dragoons, boatmen, and rebel refugees across the Sound to Lloyd’s Neck. The raiders quickly captured two of the houses being used as quarters by the Loyalists, and then turned their attention to a number of huts which sheltered other enemy whaleboat men. Although some of the Loyalists resisted, Tallmadge’s men soon secured the entire encampment, scooping up prisoners, documents, and supplies. But whatever hopes Tallmadge held for capturing the fort were dashed by a shooting which destroyed all hopes of surprise.

In April 1781, Tallmadge pushed Washington for permission to launch another raid against Fort Franklin. On April 19, Tallmadge sailed across the Sound and met with his agents who provided him with fresh maps of Fort Franklin. Once again, Tallmadge found himself thwarted by the stronghold on Lloyd’s Neck.

On the morning of July 10, a small French fleet of eight ships entered Huntington Harbor carrying a 450 man expeditionary force. The attack was quickly called off.

Fort Franklin was abandoned by the end of 1782 due to the end of the war.  The grounds became the site of a large and opulent home known as Fort Hill House and there is no trace of the fort.

 

Source:

Welch, Richard F. “Fort Franklin: Tory Bastion on Long Island Sound.” Journal of the American Revolution, 24 Feb. 2015, allthingsliberty.com/2015/03/fort-franklin-tory-bastion-on-long-island-sound

 

 

Bethpage State Parkway

 

This was the headline for the November 19, 1936 Farmingdale Post. Bethpage State Parkway cost $1.1 million to construct. The Bethpage State Parkway was constructed with a 22-foot-wide undivided pavement, providing one northbound and one southbound lane. When the Bethpage State Parkway opened in 1936, LISPC commissioner Robert Moses was considering extensions of the parkway south to Merrick Road in Massapequa, and north to the Northern State Parkway in Plainview. Beginning in the early 1960s, Moses purchased rights-of-way for the northern extension. Residents in the wealthy enclaves of Lloyd Harbor and Cold Spring Harbor thwarted plans for both the "active use" state park and the parkway. In1977, Caumsett State Park opened as a "passive use" facility for hiking, biking and horseback riding.

In 1990, the Long Island Regional Planning Board resurrected plans for extending the Bethpage State Parkway to NY 25A in Cold Spring Harbor as part of its 20-year highway improvement program. The plan did not cite potential sources for funding the extension. By 1994, this proposal appeared to be dead.  A decade later, the NYSDOT proposed a short extension of the Bethpage State Parkway north to the Seaford-Oyster Bay Expressway as part of the "LITP 2000" long-range plan. The proposed extension, which would be constructed through the southwest corner of Bethpage State Park, awaits environmental study and public review.

In 1977, maintenance of the Bethpage State Parkway was transferred from the Long Island State Park Commission to the New York State Department of Transportation although ownership remained under the jurisdiction of the New York State Office of Parks, Recreation and Historic Preservation. To accommodate the increase in traffic volume and speed, and to address the accident history, the NYSDOT began to modify the parkway in accordance with federal and state traffic safety guidelines. Among the improvements wider 12-foot travel lanes, 10-foot-wide shoulders, improved reflective signs and sand-filled impact attenuators.

In the late 1970s, there was a rehabilitation project. A pedestrian and cycling trail running parallel along the east side of the parkway was part of this project. Unlike the original trail, which ran along the west side of the parkway and only goes as far north as the Route 24 / Hempstead Turnpike exit, the new trail runs along the entire length of the parkway.

According to the NYSDOT, the Bethpage State Parkway handles approximately 15,000 vehicles per day.

Source:

“Bethpage State Parkway.” NYCRoads, www.nycroads.com/roads/bethpage/. Accessed 22 Nov. 2025

Harry deLeyer and Snowman

Harry deLeyer grew up on a farm in Sint Oedenrode, Netherlands. His family ran a brewery and delivered the beer by horse and cart. Harry began riding at age two and by the age of eight, he was competing in local shows. During World War II, the deLeyer family became members of the underground Dutch Resistance, hiding Jews on their farm, then helping get them out of Holland to safety.

In 1950, Harry moved to the United States, where he had a job on a tobacco farm in Greensborough, North Carolina waiting for him. Although he liked working on a farm, he missed riding so after work, he would ride one of the work horses. He entered a competition that offered $10 to the top rider and won first prize. 

Harry was eventually hired as a riding instructor in 1954 at the Knox School, a private girls’ school on Long Island. In winter 1956, Harry was on his way to a horse auction to see if he could find a gentle school horse. Unfortunately, a flat tire caused him to be delayed. He arrived in time to see the horses who had not been sold as they were being loaded on a truck headed for slaughter. Harry asked if he could have a look at the remaining horses. A skinny gray plow horse caught his eye. He paid $80 for the horse.

Harry let his four-year-old daughter, Harriet, name the horse. When the big gray arrived at their home and was led off the truck, snow was falling and the horse was soon covered in white, fluffy powder. Little Harriet thought he looked like a Snowman, and the name stuck. 

Each summer when the school closed, money was tight for Harry and his family. When a doctor who had a farm six miles away came looking for a quiet trail horse, Harry reluctantly sold Snowman to him for $160. Snowman returned to Harry’s farm numerous times, having jumped out of the doctor’s paddock, no matter how tall the fences were raised. 

In 1958, Snowman was champion at several shows, including at Madison Square Garden. He also was champion at the prestigious Southhampton Horse Show, now known as the Hampton Classic.

Instantly famous in the world of showjumping, Snowman and Harry were featured in a 1959 issue of Life Magazine. Harry officially retired Snowman from competition in 1969. Several books were released detailing Snowman’s life, including a children’s book titled The Story of Snowman: The Cinderella Horse, by Tony Palazzo and a biography, simply titled Snowman, by Rutherford Montgomery. The beloved horse lived with Harry for the rest of his life until he died in 1974.

Snowman was inducted into Show Jumping Hall of Fame in 1992 and released as a Breyer horse in 2005. The story of Harry and Snowman was also told in the 2011 book The Eighty-Dollar Champion: Snowman, the Horse That Inspired a Nation by Elizabeth Letts. In 2016, the documentary film “Harry and Snowman” was released by Docutainment Films.

Source:

Heilbron, Alexandra. “The True Story of Harry Deleyer and Snowman.” Alexandra Heilbron, 15 June 2017, alexandraheilbron.wordpress.com/published-online-articles/the-true-story-of-harry-de-leyer-and-snowman