I'm not 100% sure, but I think that mark was used by the Toronto Silver Plate Company.
They did produce sterling holloware.
Founded in 1882. Bought by Wm. A. Rogers Company Ltd. (Canada) c.1914.
In 1929 Wm. A. Rogers sold out to Oneida (Canada) and the Toronto Slver Plate Company trademarks were no longer used.
The scans below come from Doris and Peter Unitt's book on Canadian silver.
They attribute the marks in the second picture to the Toronto Silver Plate Company.