From the BFI archives here is a long article on Bogart from the actress and writer Louise Brooks in 1966. Well worth taking the time to read.
Here is a sample paragraph:
However, before inertia set in, he played one fascinatingly complex character, craftily directed by Nicholas Ray, in a film whose title perfectly defined Humphrey’s own isolation among people. In a Lonely Place gave him a role that he could play with complexity because the film character’s, the screenwriter’s pride in his art, his selfishness, his drunkenness, his lack of energy stabbed with lightning strokes of violence, were shared equally by the real Bogart.