ORIGINAL WILL of ADAM YOUNG - 1790
There are a number of copies of the will of Adam Young (e.g., at the Brant County Museum), however this is the only one signed (actually with an X) by Adam Young.  It surfaced in the Indian Affairs Papers which contain a large box of assorted genealogical information on the family of Adam Young (thanks to the legal "battles" waged over land in the 1830s).
To Page 2 of the Will: