2/4 london fusiliers

[franco1472]

hi i was wonder if somebody could help me out with this on i have a couple of letters dated august and september 1917 off my mother-in-law off a j o'brien from the 2/4 london fusiliers i no it might be a long shot but but could anybody find is army number or tell me if he survived the war these letters were sent to my mother-in-laws mother the soldier in question was a priest thats all i have to go on

thx frank