Never look a Gift Horse in the Mouth, 1938 (colour litho)

Never be too critical of anything you have received as a gift; the condition of a horse’s teeth is a good guide to its age but if a man needs a horse and is offered one for nothing, he should not examine its teeth too closely before accepting it; from a series of cigarette cards 'Up-to-Date Proverbs' issued by the Bocnal Tobacco Company, London; the golden age of cigarette cards was from the late 19th century until the Second World War and were immensely popular both as collector items and as a source of instruction, entertainment and amusement before the widespread use of television and radio;