Charles was educated in Dublin, gaining a B.A. in 1908 , and an M.B., B.Ch. and B.O.A. in 1912. In 1911 he wrote 'Tetany: with illustrative Case' - Dublin Journal Medical Science. He was in practice at Merthyr Vale, Glamorganshire, prior to joined the R.A.M.C. (T.F.) in 1915.