There is no William Deaton listed in the DAR Patriot Index.
There is a Joseph Deaton abt 1762-post 1810 listed and he lived in Mont. Co.NC.
You might want to send for his application paper to see what it has on it.
It will cost you $10 to get a copy of a proven DAR paper.
Send to: www.dar.org/library/online.research.cfm