This incombustibility made it a very proper sign for alchemists and apothecaries, and with the last it still continues as such, at least on the Continent. Why the early Venetian printers adopted it as a sign is less evident. In France it was certainly a favourite sign with this class of workmen; but this was from the fact of its having been the badge of Francis I., a liberal patron of the arts and sciences. The qualities attributed to the UNICORN caused this animal to be used as a sign both by chemists and goldsmiths. It was believed that the only way to capture it was to leave a handsome young virgin in one of the places where it resorted. As soon as the animal had perceived her, he would come and lie quietly down beside her, resting his head in her lap, and fall asleep, in which state he might be surprised by the hunters who watched for him. This laying his head in the lap of a virgin made the first Christians choose the unicorn as the type of Christ born from the Virgin Mary.[210] The horn, as an antidote to all poison, was also believed to be emblematic of the conquering or destruction of sin by the Messiah. Religious emblems being in great favour with the early printers, some of them for this reason adopted the unicorn as their sign; thus John Harrison lived at the UNICORN AND BIBLE in Paternoster Row 1603. Again, the reputed power of the horn caused the animal to be taken as a supporter for the apothecaries’ arms, and as a constant signboard by chemists. Albertus Magnus says:--“Cornu cerastis sunt qui dicunt præsenti veneno sudare et ideo ferri ad mensas nobilium, et fieri inde manubria cultellorum quæ infixa mensis prodant presens venenum. Sed hoc non satis probatum est.”[211] Whatever it was that passed for unicorn’s horn, (probably the horn of the narwal,) it was sold at an immense price. “The unicorn whose horn is worth a city,” says Decker in his Gull’s Hornbook; and Andrea Racci, a Florentine physician, relates that it had been sold by the apothecaries at £24 per ounce, when the current value of the same quantity of gold was only £2, 3s. 6d. In a MS. table of customs entitled, “The Book of Rates in y^{e} first yeare of Queen Mary 1531,”[212] we find the duty paid upon “cornu unicorn y^{e} ounce 20s.” An Italian author who visited England in the reign of Henry VII.,[213] speaking of the immense wealth of the religious houses in this country says:--“And I have been informed that, amongst other things, many of these monasteries possess unicorns’ horns of an extraordinary size.” Hence such a horn was fit to be placed among the royal jewels, and there it appears at the head of an inventory taken in the first year of Queen Elizabeth, and preserved in Pepys’s library.[214] “Imprimis, a piece of unicorn’s horn,” which, as the most valuable object, is named first.