It has been said by some that he studied under Philip Bervalde the elder, and by others under John Muller, otherwise called Regiomontanus, though De Murr, who has made diligent inquiry into his history, discredits both assertions. According to a correspondence between Behem and his uncle discovered of late years by De Murr, it appears that the early part of his life was devoted to commerce. Some have given him the credit of discovering the island of Fayal, but this is an error, arising probably from the circumstance that Job de Huertar, father-in-law of Behem, colonized that island in 1466.
He is supposed to have arrived at Portugal in 1481, while Alphonso V was still on the throne; it is certain that shortly afterwards he was in high repute for his science in the court of Lisbon, insomuch that he was one of the council appointed by king John II to improve the art of navigation, and by some he has received the whole credit of the memorable service rendered to commerce by that council, in the introduction of the astrolabe into nautical use.
In 1484 king John sent an expedition under Diego Cam, as Barros calls him, Cano according to others, to prosecute discoveries along the coast of Africa. In this expedition Behem sailed as cosmographer. They crossed the equinoctial line, discovered the coast of Congo, advanced to twenty-two degrees forty-five minutes of south latitude, [317] and erected two columns, on which were engraved the arms of Portugal, in the mouth of the river Zagra, in Africa, which thence, for some time, took the name of the River of Columns. [318]
For the services rendered on this and on previous occasions, it is said that Behem was knighted by king John in 1485, though no mention is made of such a circumstance in any of the contemporary historians. The principal proof of his having received this mark of distinction, is his having given himself the title on his own globe of Eques Lusitanus.
In 1486 he married at Fayal the daughter of Job de Huerter, and is supposed to have remained there for some few years, where he had a son named Martin, born in 1489. During his residence at Lisbon and Fayal, it is probable the acquaintance took place between him and Columbus, to which Herrera and others allude; and the admiral may have heard from him some of the rumors circulating in the islands, of indications of western lands floating to their shores.
In 1491 he returned to Nuremburg to see his family, and while there, in 1492, he finished a terrestrial globe, considered a masterpiece in those days, which he had undertaken at the request of the principal magistrates of his native city.
In 1493 he returned to Portugal, and from thence proceeded to Fayal.
In 1494 king John II, who had a high opinion of him, sent him to Flanders to his natural son prince George, the intended heir of his crown. In the course of his voyage Behem was captured and carried to England, where he remained for three months detained by illness. Having recovered, he again put to sea, but was captured by a corsair and carried to France. Having ransomed himself, he proceeded to Antwerp and Bruges, but returned almost immediately to Portugal. Nothing more is known of him for several years, during which time it is supposed he remained with his family in Fayal, too old to make further voyages. In 1506 he went from Fayal to Lisbon, where he died.
The assertion that Behem had discovered the western world previous to Columbus, in the course of the voyage with Cam, was founded on a misinterpretation of a passage interpolated in the chronicle of Hartmann Schedel, a contemporary writer. This passage mentions, that when the voyagers were in the Southern Ocean not far from the coast, and had passed the line, they came into another hemisphere, where, when they looked towards the east, their shadows fell towards the south, on their right hand; that here they discovered a new world, unknown until then, and which for many years had never been sought except by the Genoese, and by them unsuccessfully.
"Hii duo, bono deorum auspicio, mare meridionale sulcantes, a littore non longe evagantes, superato circulo equinoctiali, in alterum orbem excepti stint. Ubi ipsis stantibus orientem versus, umbra ad meridiem et dextram projiciebatur. Aperuêre igitur sua industria, alium orbem hactenus nobis incognitum et multis annis, a nullis quam Januensibus, licet frustra temptatum."