The Gildersleeve Family Manuscript at NYGBS
I have seen a lot of talk in here about Gildersleeve Pioneers, published by Willard Harvey Gildersleeve in 1941, but I feel the more definitive source is "The Gildersleeve Family" manuscript that is held by the New York Biographical and Genealogical Society in Manhattan. It is very extensive and traces most lines down through the Nineteenth Century it seems. I'm not sure if this was ever published and circulated as I use the original manuscript at the NYGB Library.
I was able to pick up my line right away. FWIW ..I am descended via Angeline Gildersleeve (Smith) (1830-1888) - daughter of James Gildersleeve and Mary Archer of Brooklyn (Angeline, James, John, James, Richard, George, Thomas, Richard, Richard).
Our line (John Gildersleeve = Rebecca Raynor) moved into Brooklyn from Hempstead around circa 1800, though John and Rebecca were later buried in a plot which is today within the bounds of Hempstead Lake State Park in Rockville Centre. His son James married Mary Archer and their daughter Angeline married William T. Smith of Brooklyn.