The officer in question is (likely) John Eric Howard TIDSWELL. His CEF records are available online
http://central.bac-lac.gc.ca/.item/?...CEF&id=9690-46
What is not included in those documents is mention of his military career both before and after his overseas service in The Great War. With an uncommon surname and initials it is likely that this gentleman is the same one that shows up in online searches as an ex-Cadet of the Royal Military College of Canada (college number 1164) who likely left the college early to join up in order to go overseas (very common). He remained in the army, Permanent Force (CASC/RCASC), and eventually retired with the rank of Lt-Col following WW2.