There is no P G Page. This man has the right profile and is the only Page I could find that would fit. I suspect that the clerk misheard C as P !
1896 Jul 2 Born Essex
1920 Oct 12. Joined RIC with RIC no 74238 & ADRIC no (825 ) ex-Soldier & Waiter
1920 Nov 4 . Posted Longford
1921 Jan 19. Posted to I Coy
1921 Feb 12. Struck off to Gormanston
1921 Feb 21 Resigned