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| - After studying philology at the Erfurt academy and at Leiden, he travelled in order to increase his linguistic knowledge. While searching in Rome for some documents at the request of the Swedish Court (1649), he became acquainted with one Gregorius, a monk from the Ethiopian province of Amhara, and acquired from him an intimate knowledge of the Ethiopian language. In 1652 he entered the service of the duke of Saxe-Gotha, in which he continued until 1678, when he retired to Frankfurt-am-Main. In 1683 he visited England to promote a cherished scheme for establishing trade with Ethiopia, but his efforts were unsuccessful, chiefly through the resistance of the authorities of the Ethiopian Orthodox Church. Returning to Frankfort in 1684, he gave himself wholly to literary work, which he continued almost to his death. In 1690 he was appointed president of the Collegium Imperiale Historicum.
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