Letter from William Heathcote De Lancey to Mordaunt Barnard, September 11, 1852

Account of William Heathcote De Lancey, November, 1858

Letter from William De Zeng to Josephine M. De Zeng, December 5, 1847

Letter from William Heathcote De Lancey to Edward Floyd De Lancey, September 5, 1861

Letter from William Heathcote De Lancey to Elizabeth Herbert, May 16, 1859

Telegram from William Heathcote De Lancey to Edward Floyd De Lancey, November 15, 1858

Letter from William Heathcote De Lancey to Edward Floyd De Lancey, January 7, 1850

Letter from William Heathcote De Lancey to Thomas J. De Lancey, January 5, 1848

Letter from William Heathcote De Lancey to Anne Charlotte McAdam, November 19, 1836

Letter from Reverend G. M. Skinner to Edward Floyd De Lancey, August 17, 1900

Letter from William Heathcote De Lancey to Edward Floyd De Lancey, January 28, 1859

Questionnaire for Harvard Law School directory

Letter from William Heathcote De Lancey, March 10, 1859

Letter from William Heathcote De Lancey to Lord Ashburton, March 14, 1859

Letter from Oliver De Lancey to Sir William Johnson, January 19, 1762

Proposal from William Heathcote De Lancey to Hon. James S. Wadsworth, Chairman of Senate Committee on Colleges, February 22, 1858

Letter from Frances Munro De Lancey to Edward Floyd De Lancey, June 6, 1865

Letter from Frances Munro De Lancey to Edward Floyd De Lancey, June 19, 1865

Letter from Mary De Lancey to John De Lancey, October 29, 1789

Letter from John De Lancey to James De Lancey, April 24, 1790