Son Henry joined the Canadian military and on paperwork dated May 1, 1916 he states his mother is a widow (Maggie Chambers) of Parry Sound Ontario he was sending her $10.00 per month.
He married while on active duty and a letter was sent to his mother in Parry Sound that the payments will stop. $20.00 per month then went to his wife.
Then when he first enlisted December 1915 he listed his mother Margaret Chambers as next of kin.
So her husband Thomas must have died in Parry Sound before 1916 or even 1915 when he enlisted.
ADDED Is this the correct Henry or did he fib about his age when he joined up?