Complex sentence: He was, however, sent as a deputy to Aarau, where he was appointed president of the educational department, and afterwards as government commissioner to Unterwalden, his authority being ultimately extended over the cantons of Uri, Schwyz and Zug.
Split into simpler sentences: He was, however, sent as a deputy to Aarau, where he was appointed president of the educational department. His authority was ultimately extended over the cantons of Uri, Schwyz and Zug.