(April 8, 1893) The Illustrated American، 13، Chicago, Illinois: The Illustrated American Publishing Company، no. 164 ، p. 427 Retrieved on August 5, 2014.
Original is an 1890 Edward Bierstadt photograph, available here: http://collections.mcny.org/Collection/-24UAKVATZJG.html

Also published in Williams, Gray (2003) Picturing Our Past: National Register Sites in Westchester County، Elmsford: Westchester County Historical Society، p. 341 ISBN: 0-915585-14-6. OCLC: 53180357. ; one of the scans comes from that book, which labels the image as "Engraving in History of Westchester County, New York, from its Earliest Settlement to the Year 1900, by Frederic Shonnard and W.W. Spooner. New York History Company, New York, 1900."