Groucho Marx? Jim Brewer ? Mary Stuart? Anonymous?
Dear Quote Investigator: You have researched some quotes credited to Groucho Marx, so I am hoping that you will be able to look into a saying that interests me. I work in a library and have long enjoyed the following quip:
Outside of a dog, a book is a man’s best friend. Inside of a dog, it’s too dark to read.
I have seen it on websites associated with libraries where the saying is credited to Groucho. Is this attribution accurate?
Quote Investigator: The earliest attribution to Groucho that QI has located occurred in 1974 at a museum exhibit celebrating words and reading. But the provenance of the quip can be traced further back to the 1950s. Top-notch researcher, John Baker, located the earliest known instance of this joke in an issue of Boys’ Life magazine dated 1954. In this initial appearance the quip is credited to Jim Brewer and not to Groucho Marx.