Note 218 — ON SOME SCOTTISH MAGICAL CHARM-STONES, OR CURING-STONES.
Reading edition
"What we are going to say," observes Pliny, "is marvellous, but it may easily be tested by experiment. If a person repents of a blow given to another, either by hand or with a missile, he has nothing to do but to spit at once into the palm of the hand which has inflicted the blow, and all feeling of resentment will be instantly alleviated in the person struck. This, too, is often verified in the case of a beast of burden, when brought on its haunches with blows: for, upon this remedy being adopted, the animal will immediately step out and mend its pace. Some persons, also, before making an effort, spit into the hand in the manner above stated, in order to make the blow more heavy."—Pliny's Natural History, xxviii. § 7.