Immense Rock on Slide, Frank, Alta.

Like the other other cards (excepting possibly the "Entrance to Coal Mine" card), this one is addressed to W. H. Cobley, Esq., 33 Stimpson Ave., Northampton, England. The back is undivided -- unlike the other three cards -- and it was posted at Frank on July 15, 1907. The Frank Slide occurred on April 29, 1903. en.wikipedia.org/wiki/Frank_Slide