Identified as William Rork at Fold3 online.
R 4 Pa.
Appears as signature to a Receipt Roll
under the following heading:
"We whose Names are hereunder written have Received a Months pay of Lt Sproat
Roll dated: Bound Brook, May 7 (or 17), 1777
William (his X mark) Rork 50
Our William Roark was present at Bound Brook per his Revolutionary War pension application.
The William Roark of the 4th PA was from Chester.