Corporal Herbert George Carpenter, from Portsmouth, was serving in the 2nd Battalion of the Royal Fusiliers at Galipoli. He was killed on 25 April 1915. He has no known grave, and is remembered on the Helles Memorial.
Private Thomas William Carpenter, 28 and from 175 Fawcett Road, was also at Galipoli. Serving with the 1st Battalion of the Lancashire Fusiliers, he was also killed on 25 April 1915, and is also remembered on the Helles Memorial.
It seems a big coincidence that two men of the same surname, from the same city, but serving in different Battalions were killed on the same day, at Galipoli. Unortunately, we do not know for certain where in Portsmouh Herbert Carpenter came from.
Could they be brothers? It should be possible to tell from street directories and Register Office records whether they were in fact brothers. If not, then its a remarkable coincidence. If they were brothers, then it must have been a deep tragedy for their family to lose two sons on the same day, in the same battle.