Tacitus reports, that among certain barbarian kings their manner was, when they would make a firm obligation, to join their right hands close to one another, and intertwist their thumbs; and when, by force of straining, the blood it appeared in the ends, they lightly pricked them with some sharp instrument, and mutually sucked them.
Physicians say, that the thumbs are the master fingers of the hand, and that their Latin etymology is derived from “pollere.” The Greeks called them Anticheir, as who should say, another hand. And it seems that the Latins also sometimes take it in this sense for the whole hand;
“Sed nec vocibus excitata blandis,
Molli pollice nec rogata, surgit.”
“Fautor utroque tuum laudabit pollice ludum:”
“Converso pollice vulgi,
Quemlibet occidunt populariter.”
In Lacedaemon, pedagogues chastised their scholars by biting their thumb.
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