Complex sentence: This was but another time consuming duty that came to Commander Matthew Fontaine Maury who headed the observatory from its beginning until 1861 when Maury resigned to serve his state, his home, kin and friends.
Split into simpler sentences: This was but another time consuming duty that came to Matthew Fontaine Maury who headed the observatory from its beginning until 1861. When Maury resigned to serve his state, his home, kin and friends.