I couldn't find a death registration either for Henry Vanluven.
On 1911 census their 'address' is given as North 1/2 Lot 6,Concession 3.
There is one Vanluven grave in New Liskeard Cemetery - Clifford Vanluven 1929-1991 and his wife Audrey L Barney 1933-1983.
No Vanluven in Brethour Public Cemetery or Belle Vallee Cemetery in Brethour.
Even if there was no headstone, the cemetery should have a record of a burial.
This site will have addresses for the cemeteries.
http://www.rootsweb.ancestry.com/~cangmg/search.htmWilliam Henry and Matilda are buried in Union Cemetery Stayner Ont. Maybe Henry is there too.
On a family tree on ancestry.ca it says that Henry died of Bright's disease, 1912, at age 20. Information given by sister Mildred.
Records from the north were a bit sporadic as the returns only happened when a government agent came around to collect them.