....I'm afraid, but I did delve into the archives and came up with some stuff about Nestledown Farm as referenced on the map link above.
Nestledown was the summer residence of Mrs. John F. Zebley. Mrs. Zebley's father was Loammi Bean for whom the fountain in Veteran's Square in the Weirs is named. Mrs. Zebley commisioned the fountain. Loammi Bean purchased the property in 1861 so his family could reside there during his absence in the civil war with the 8th NH regiment. (See the "Weirs Souvenir" thread)
If the road going horizontally across in mid-range is the road to the bridge, would the stone structure be just to the left in this image?
Nestledown was destroyed by fire (as so many fine old lake structures were - *editor's note) on April 25, 1923. The place was later developed and called the Plantation. It was a 'typical farm' from the old south, run by Mrs. Lillian B. Carroll. It accommodated 68 guests and the grounds covered 150 acres with private beach. The last of the buildings burned in 1954. Today the site is occupied by the Sundown Condominiums.
In 1861 could this have been all one big parcel?
Nestledown in 1923.