From the reverse of picture:
"On September 28, 1958, an historical plaque commemorating Sir William Mulock was unveiled in the village of Bond Head, Simcoe County. This plaque is one of a series being erected throughout the province by the Archaeological and Historic Sites Board of Ontario. Shown standing around the plaque, left to right, are Mr. Herbert Hughes, Councillor of West Gwillimbury; Mr. C.T.S. Evans, Q.C.; Mr. Arthur Evans, warden of Simcoe County; Mr. Percy Selby, Reeve of West Gwillimbury Township; the Rev. C.R.P. Hearn who dedicated the plaque; Mr. William T. Mulock, great-great-grandson of Sir William; the Hon. W. Earl Rowe, M.P.; Prof. T.F. McIlwraith, a member of the Historic Sites Board; Mr. Thomas H. Mulock, great-grandson of Sir William; Mr. George Lisk, Reeve of Tecumseth Township; and Mr. Murray Mills, Chairman of the Tourist and Industrial Association of Simcoe County."

Article about the dedication ceremony of Trinity Anglican Church's extension.