Complex sentence: During his time in Gibraltar he presided over the Vice Admiralty Court in December 1872 which enquired into the fate of the Mary Celeste, a ship that was found abandoned at sea without any rational explanation.
Split into simpler sentences: During his time in Gibraltar he presided over Vice Admiralty Court in December 1872 which heard the enquiry into the fate of the Mary Celeste. A ship that was found abandoned at sea without any rational explanation.