Here's the information I have:
"In the summer of 1911, he took work in a quarry on an island near Kensington Point. On July 11th of that year, while crossing in a canoe to mainland, he was drowned at the age of 19 years. He is buried in an old cemetery near MacLennan, which was the one being used at that time."
So he passed away July 11th, 1911.