A Georgian manor house in Cold Spring Harbor, purchased by financier J.P. Morgan Jr. in 1933 as a wedding gift for his daughter and once part of land that is now the Uplands Farm Nature Sanctuary, is on the market for $13.8 million.

Morgan’s daughter, Jane Nichols, lived in the circa-1910 home until her death in 1981, says listing agent Marilyn Szczerbiak of Daniel Gale Sotheby’s International Realty. The Nature Conservancy acquired her 97-acre property, a working dairy farm called Uplands Farm, a little at a time before Nichols bequeathed the rest of the land to the Conservancy after her death, according a 1987 report in The New York Times.

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In 1982, the Conservancy sold the house and property on Lawrence Hill Road that is now for sale. The Cold Spring Harbor Laboratory also purchased some of the land for its Agricultural Field Station in 1984.

Nichols was part of the movement to ban the pesticide DDT, after she found that the milk from her farm’s Guernsey cows had been contaminated, Szczerbiak says.

The 22,000-square-foot home with eight bedrooms and 10 full and four half bathrooms, has been restored and updated by the current owners, Szczerbiak says, and features original moldings and chandeliers, as well as a movie theater. They also found old architectural plans with a wing that had been taken off, and built it back.

“They felt in order to give the house more balance and aesthetic beauty they should add the wing back on,” Szczerbiak says.

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The 5.44-acre property features a an in-ground pool and pool house with a kitchen, as well as a basketball court.