It has never been pretended, so far as I am aware, that the Rosicrucian mystics of the middle ages did anything for the advancement of pharmacy. They are only mentioned here because they claimed the power of curing disease, and also because it happens that the fiction which created the legends concerning them was almost contemporaneous with the not unsimilar one (if the latter be a fiction) which made a historical figure of Basil Valentine. Between 1614 and 1616 three works were published professing to reveal the history of the brethren of the Rosy Cross. The first was known as Fama Fraternitatis, the second was the Confessio Fraternitatis, and the third and most important was the “Chymical Marriage of Christian Rosencreutz.” The treatises are written in a mystic jargon, and have been interpreted as alchemical or religious parables, though vast numbers of learned men adopted the records as statements of facts. It was asserted that Christian Rosencreutz, a German, born in 1378, had travelled in the East, and from the wise men of Arabia and other countries had learnt the secrets of their knowledge, religious, necromantic, and alchemical. On his return to Germany he and seven other persons formed this fraternity, which was to be kept secret for a hundred years. The brethren, it is suggested, communicated to each other their discoveries and the knowledge which had been transmitted to them to communicate with each other. They were to treat the sick poor free, were to wear no distinctive dress, but they used the letters C.R. They knew how to make gold, but this was not of much value to them, for they did not seek wealth. They were to meet once a year, and each one appointed his own successor, but there were to be no tombstones or other memorials. Christian Rosencreutz himself is reported to have died at the age of 106, and long afterwards his skeleton was found in a house, a wall having been built over him. Their chief business being to heal the sick poor, they must have known much about medicine, but the books do not reveal anything of any use. They acquired their knowledge, not by study, but by the direct illumination of God. The theories--such as they were--were Paracelsian, and the fraternity, though mystic, was Protestant. The most curious feature of the story is that the almost obviously fictitious character of the documents which announced it should have been so widely believed. Very soon after their publication German students were fiercely disputing concerning the authenticity of the revelations, and the controversy continued for two hundred years. Much learned investigation into the origin of the first treatises has been made, and the most usual conclusion has been that they were written by a German theologian, Johann Valentin Andreas, of Württemberg, b. 1586, d. 1654. He is said to have declared before his death that he wrote the alleged history expressly as a work of fiction. THE DOCTRINE OF SIGNATURES