The plan is part of the Sir Henry Clinton’s collection of maps and plans now held by the University of Michigan Clements Library: 'Sketch of the position of the army on Long Island upon the morning of the 26th of August, 1776; with the march on the ensuing night; and the action of the 27th.’. https://quod.lib.umich.edu/w/wcl1ic/x-200/wcl000273. University of Michigan Library Digital Collections [See also appendix 9].