Probably young Mr. Farquharson.

That would be Alexander Farquharson (see O9n4 ) or his brother John Farquharson Jr., aged ca. 21. (bapt. 22 Sept. 1794). (John Farguharson Jr. was m. 1 June 1822 at Eastern Passage to Mary, widow of William Anderson and 2nd. dau. of Peter McNab.