I think I deciphered some of it:
He died from a shell wound 2 days after he was hit (about Oct. 23rd) between ///// House and Passchendaele Ridge. His brother Charles (there is another "C. Anderson" in the 5th Pioneers and I think he //// but not in the cook house) who is a man of about 27 in C. Coy. 5th Pioneers in /// cook house, will have all the details. He served with the /// reinforcement and belonged to C. Coy. A very tall man. We called him "Long-un"
A. G. Campbell Informant: Lt. Col. R. W/////, 3///
London 5th Pioneers, A. I. F. L. XIV