I don't have a direct connection to your John MAITLAND, however, I do have a James Clerihew MAITLAND, b. 12 June 1885 in Aberdeen, Scotland, m. 16 July 1909 in Old Machar, Aberdeen to Mary Gavin.I found a death record for James Clerihew MAITLAND in the BC Archives, he died 4 April 1972 in Coquitlam, BC and was "buried" 6 April 1972 in the Vancouver Crematorium:
Name: JAMES CLERIHEW MAITLAND Gender: Male Age: 86 Death Date: 4 April 1972 Place of Death: COQUITLAM Registration #: 1972-09-005402 BCA #: B13316 GSU #: 2034299
What is truly strange about this is that there is no sign of Mary Gavin MAITLAND dying in either BC or back in Scotland.Additionally, James Clerihew MAITLAND also had an alias of Bob MCLEAN listed on his death record.I never found any children for this marriage.His death records states he was in "province" 62 years, which would mean he moved to BC/Canada shortly after his marriage.
If you see any connection please let me know as this one remains a mystery to me.He was my first cousin, twice removed.