1853 -- Llewellyn Haskell buys the old farmhouse belonging to Henry Walker.
1854 -- Haskell begins building his house, the Eyrie (meaning the nest of a bird of prey), on the foundation of Henry Walker's old farmhouse. The house was designed by famous architect Alexander Jackson Davis. Haskell founded nearby Llewellyn Park, America's first planned community. He had wanted Eagle Rock to be part of Llewellyn Park, but that did not come to pass.
1860 -- the New York Illustrated News published a wood engraving of Eagle Rock, the earliest depiction of the rock.
1860 -- the gate house at the main entrance to Llewellyn Park designed to look like the Eyrie.
1872 -- death of Llewellyn Haskell.
Llewellyn Park history
A Queen Anne style mansion with 29 rooms, Glenmont was designed by the architect Henry Hudson Holly. Edison purchased the Glenmont estate 13.5 acres including house, barn, greenhouse, and furnishings in January of 1886 for $125,000, half its estimated value.