attributed to the St. John's wort. According to an old tradition, any
baptized person whose eyes were anointed with the green juice of its
inner bark could see witches in any part of the world. Hence the tree
was extremely obnoxious to witches, a fact which probably accounts for
its having been so often planted near cottages. Its magic influence has
also caused it to be introduced into various rites, as in Styria on
Bertha Night (January 6th), when the devil goes about in great
force.[21] As a safeguard, persons are recommended to make a magic
circle, in the centre of which they should stand with elder-berries
gathered on St. John's Night. By so doing the mystic fern seed may be
obtained, which possesses the strength of thirty or forty men. In
Germany, too, a species of wild radish is said to reveal witches, as
also is the ivy, and saxifrage enables its bearer to see witches on
Walpurgis Night.

But, in spite of plants of this kind, witches somehow or other contrived
to escape detection by the employment of the most subtle charms and
spells. They generally, too, took the precaution of avoiding such plants
as were antagonistic to them, displaying a cunning ingenuity in most of
their designs which it was by no means easy to forestall. Hence in the
composition of their philtres and potions they infused the juices of the
most deadly herbs, such as that of the nightshade or monkshood; and to
add to the potency of these baleful draughts they considered it
necessary to add as many as seven or nine of the most poisonous plants
they could obtain, such, for instance, as those enumerated by one of the
witches in Ben Jonson's "Masque of Queens," who says:--

"And I ha' been plucking plants among
Hemlock, Henbane, Adder's Tongue;
Nightshade, Moonwort, Libbard's bane,