While the use of the Cagliostro seal really formed no part of the trick, its possession by Robert-Houdin goes to show how indefatigably he collected conjuring curios and how quick he was to utilize any part of his collection, and score thereby a brilliant showing. Cagliostro seals were by no means rare. This prince of charlatans had seals, like adventures, in great variety; and in this connection, it is not out of place to tell something of Cagliostro and thus explain why the parchment bearing his seal created such a sensation at St. Cloud. Cagliostro has no match in the annals of magic. Not a conjurer in the sense of being a public entertainer, he yet mystified and bewitched his thousands. Something of a physician, more of an alchemist, and altogether a charlatan, he left behind him a trail of brilliant chicanery, daring adventure, and ignominious failure and undoing unequalled in the history of Europe. [Illustration: Reproduction of a rare portrait of Seraphinia Feliciani, Comtesse de Cagliostro, wrongfully called Lorenzo in the Encyclopædia Britannica. From the Harry Houdini Collection.] Cagliostro was born Joseph Balsamo, in Palermo, Italy, June 8th, 1743. His parents were in humble circumstances and he started his career as a novice in the Convent of Benfratelli, from which he was expelled for incorrigibility. Then he plunged into a life of dissipation and cleverly planned, ofttimes brilliantly executed crimes. He fled Palermo after forging theatre tickets and a will, and duping a goldsmith out of sixty pieces of gold. At Messina he fell in with an alchemist named Althotas, a man of some learning who spoke a variety of languages. These two adventurers travelled in Egypt, and when Althotas died Cagliostro went to Naples and Rome, where he married a beautiful girdle-maker named Seraphinia Feliciani. This woman shared both his triumphs and his disgrace. In 1776 they arrived in London, where he announced himself as the Count di Cagliostro. The title was assumed, the name was borrowed from his mother's side of the house. Here for the first time Cagliostro announced himself also a worker of miracles or wonders. He exhibited two mysterious substances, "Materia Prima," with which he transmuted all baser metals into gold, and "Egyptian Wine," with which he claimed to prolong life. His wife, who was just past twenty, he declared was more than sixty, her youthful appearance being due to the use of his elixir. He founded a spurious Egyptian rite in connection with the Masonic order which has been recognized as a blot upon Masonic history, and he claimed thousands of Masonic dupes. All over the Continent he and his beautiful wife travelled, now healing the poor for nothing, now duping the rich, but always living in a most picturesque, voluptuous fashion. He dipped into spiritualism and mesmerism, but wherever he went his converts followed after.