Helen M. Winslow wrote Concerning Cats in 1900. The Table of Contents includes Concerning the Pretty Lady, Concerning my other cats, Concerning other people's cats, Concerning still other people's cats, Concerning some historic cats, Concerning cats in England, Concerning cat clubs and cat shows, Concerning high-bred cats in America, Concerning cats in poetry, Concerning cat artists, Concerning cat hospitals and refuges, Concerning the origin of cats, Concerning varieties of cats, and Concerning cat language.