In the Tyrolese mines Paracelsus learned much about minerals, about diseases, and about men. Then he travelled through various parts of Europe, paying his way by his medical and surgical skill, or, as his enemies said, by conjuring and necromancy. He states that he was in the wars in Venice, Denmark, and the Netherlands; it is supposed as an army surgeon, for he afterwards declared that he then learned to cure forty diseases of the body. He boasted that he learned from gypsies, physicians, barbers, executioners, and from all kinds of people. He claims also to have been in Tartary, and to have accompanied the Khan's son to Constantinople. Van Helmont tells us that it was in this city that he met an adept who gave him the philosopher's stone. Other chroniclers relate that this adept was a certain Solomon Trismensinus, who also possessed the elixir of life, and had been met with some two hundred years later.
Although Paracelsus in his writings appears to hold the current belief in the transmutation of metals, and in the possibility of producing medicines capable of indefinitely prolonging life, he wasted no energy in dreaming about these, as the alchemists generally did. The production of gold does not seem to have interested him, and his aims in medicine were always eminently practical. It is true that he named his compounds catholicons, elixirs, and panaceas, but they were all real remedies for specific complaints; and in the treatment of these he must have been marvellously successful.
Whether he ever went to Tartary or not, and whether he served in any wars or not, may be doubtful. His critics find no evidence of acquaintance with foreign languages or customs in his works, and they do find indications of very elementary notions of geography.