Pam in Eureka, California, says that when her mother and grandmother would enter a particularly dark room, they’d remark that it was dark as the inside of a goat. Mark Twain used the phrase dark as the inside of a cow in his book Roughing It as well as The Innocents Abroad. Other versions: dark as the inside of a whale, cat, black cat, a sack, a horse, a magician’s hat, a coal scuttle, the Devil’s waistcoat pocket, and as the inside of a needle. Joyce Cary wrote about something being as dark as the inside of a cabinet minister, and Groucho Marx also had something to say about the inside of a dog. This is part of a complete episode.