Try Maps | National Archives www.archives.gov › research map www.archives.gov
Also http://www.historicmapworks.com/
Another great resource is: Library of Congress Search Page for County Land Ownership Maps, New York State, https://www.loc.gov/search/?fa=partof:county+landownership+maps%7Clocation:new+york+%28state%29 ,accessed 15 Mar 2021.