Patriots Who Fell During Rev War at Burning of Hannahstown PA

I recently learned that my gr-x6 grandfather fell during the Indian/Canadian militia attack at the "Burning of Hannastown" in Westmoreland Co. PA. His name was Samuel Steele, an immigrant thru Ireland who joined the Westmoreland co militia as a Patriot. His son Isaac was there that day also but survived. I have googled several narrative accounts about this attack, but my gr-grandfather was never mentioned by name. I wonder where the victims of this attack may be buried, and if it might be possible to find a grave for Samuel. I have been to searchagrave.com.
I would appreciate all suggestions to find where to look for Samuel's resting place.