It is said that playing-cards were devised by the ancients to hide a secret where those not "in the know" would never think of looking for it. For heresy-hunters are serious-minded people who would never think of looking for religion in a game. It is curious to think how men have gambled, fought and slain one another over these unknown symbols, and it is interesting to wonder whether the most accomplished 'poker face' would fall a little on discovering that he was playing for lucre with emblems just as holy as the cross, the chalice and the crown of thorns. Probably not, for men have done things just as terrible in the name of symbols whose holiness they recognized. However, it is no less strange that the puritanic mind should see in diamonds, spades, hearts and clubs the signs of vice, to be avoided at all times and more especially on Sundays.