Notes
Hornshaw and Fowler provide the details. He joined the school in 1906 and enlisted in August 1914. However, he was admitted to Beckett's Hospital in Leeds with a weak heart and, when discharged, was assigned to the York Records Office as a Sergeant. He relinquished this rank in April 1918but was killed by shellfire on his first day at the front, sadly also the same day his younger brother, Douglas Hamblett Siddall, was also killed.