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 singularly handsome and popular youth. He led an adventurous life, voyaging, exploring, and fighting Spanish ships. He failed to establish his claims to his titles and estates in England, and ultimately settled at Florence, where he became a Catholic, and distinguished himself as an engineer and architect. He won the favour of Ferdinand II, Emperor of Austria, who created him Earl of Warwick and Duke of Northumberland, and the Pope recognised his nobility. He died in Italy in 1649. The chroniclers of the time refer to a book he is said to have written under the title of Catholicon, which was "in good esteem among physicians." If it existed it was probably a collection of medical formulæ, but it is not unlikely that this supposed book has been confused with one written by a Dr. Cornacchini, of Pisa, and dedicated to Dudley. In that work, which is known, the powder is described, and its invention is attributed to the Earl. It is alleged to have possessed marvellous medicinal virtues.

Under this title a powder had a great reputation about the middle of the eighteenth century, and well on into the nineteenth century. The powder was composed of aristolochia rotunda (birthwort root), gentian root, and the tops and leaves of germander, ground pine, and centaury, of each equal parts. One drachm was to be taken every morning, fasting, for three months, and then 1/2 drachm for the rest of the year. Particular directions in regard to diet were given with the formula.

The compound was evidently only a slight modification of several to be found in the works of the later