Now, if, by the side of any of these, another spot is added, it will immediately serve to show what card it is.
Fig. 21.
The mark should be placed near one of the original spots, as shown below in figure 22, which, when placed at the top, shows it is an ace; going round to the right of it, the next spot would be a king, the third spot a queen, the fourth a knave, and so on to the seven.
Fig. 22.
It must be clearly understood that only one spot is to be made, as in [figure 21], where that which is added to the third spot, would (according to the rules I have laid down), mark the eight of clubs.
After these explanations, I feel convinced, my reader has already made up his mind, never again to play with cards on which there are devices.
"If these are the sort of tricks one is subject to," exclaims he, "I'll take care that I never play with anything but plain cards again."
Unfortunately, even these can be tampered with, as I have already shown in speaking of tinted cards; of which I will now give another proof.