"If all the world Should in a fit of temp'rance feed on pulse," and, according to Neanthes, quoted by Iamblichus in his life of Pythagoras, the prohibition extended even to treading down the growing bean; for, he informs us, Pythagoras inculcated the virtue of chastity so successfully that when ten of his disciples, being attacked, might have escaped by crossing a bean-field, they died to a man rather than tread down the beans: and when another disciple, who was shortly afterwards captured and brought before Dionysius, was bidden by that tyrant to explain the strange conduct of his fellows, he replied, "They suffered themselves to be put to death rather than tread beans under foot; and I will rather tread beans under foot than reveal the reason." This is sufficiently mysterious; and the Pythagorean symbol can scarcely be said to explain the Italian prohibition. But though Plutarch has committed the error of defining _ignotum per ignotius_, he has nevertheless been led by a sound instinct, in comparing the two things together. Mr. Frazer (in _Folk-Lore_, i. 145 _ff._) has abundantly shown that many of the symbols of Pythagoras are but maxims of folk-lore which have gathered round the name of that mysterious philosopher. It would be nothing strange, then, if a piece of Italian folklore should be fathered on Pythagoras, for Magna Graecia was the home of Pythagoreanism. Now the folk has at all times been fond of discovering resemblances between plants and other objects, as the common names of flowers, &c., sufficiently show. Further, according to popular notions, these resemblances do not exist for nothing: between the plant and the object it resembles there exists an occult but potent relation. The "Doctrine of Signatures" was a quasi-scientific organisation of this branch of folk-lore. "Turmeric has a brilliant yellow colour, which indicates that it has the power of curing jaundice; for the same reason, poppies must relieve diseases of the head," to take a couple of instances from the _Pharmacologia_ of Dr. Paris (p. 43). The ancient Romans who substituted an offering of poppy-heads for a sacrifice of human beings were not practising a childish cheat on the gods: on all sound principles of folk-lore they were offering a perfectly valid equivalent.