The signature is "RAE" who is Canadian illustrator George Menendez Rae (1906-1992). In my first post about Rae I showed two covers he did for Wm. Collins & Sons Canada's White Circle Pocket Library. This is the third and I have now identified a fourth.
Below is one of the oddest of the 376 illustrated covers in the White Circle imprint. Plus a tamer Western.
White Circle 325 - 1947
WC 325 artist
White Circle 329 - 1947