To go along with the Happy Trails post, I searched for “western paperback covers” and stumbled into some early 20th Century dust jackets. Dane Coolidge was a California writer of genre fiction; mostly Westerns. His first two books featured covers by the great painter Maynard Dixon who got first billing in the post title because I’m very familiar with his work. The only Coolidge whose work I’m familiar with is Calvin and I’m not a fan.
Hidden Water was published in 1910 and The Texican in 1911. Sometimes it’s fun to fall down an internet rabbit hole.