Peter Tohill was the son of Hugh and Elizabeth Tohill of Stewartstown, County Tyrone. There is some dispute as to whether Peter was born in Belfast or Londonderry. When he enlisted in Banbridge he did so under a false name. He used the name of Patrick O’Neill on his enlistment and it is stated that Patrick O’Neill was born in Belfast, but according to Commonwealth War Graves details, he was born in Londonderry.
The Ploegsteert Memorial stands in Berks Cemetery Extension, which is located 12.5 Kms south of Ieper town centre, on the N365 leading from Ieper to Mesen (Messines), Ploegsteert and on to Armentieres. From Ieper town centre the Rijselsestraat runs from the market square, through the Lille Gate (Rijselpoort) and directly over the crossroads with the Ieper ring road. The road name then changes to the Rijselseweg (N336). 3.5 Kms along the N336 lies a fork junction with the N365. The N365, which forms the right hand fork, leads to the town of Mesen. The Cemetery lies 3 Kms beyond Mesen on the right hand side of the N365, and opposite Hyde Park Corner Royal Berks Cemetery.