Complex sentence: From 1842 to 31 Dec.1855 he was connected with the Cunard line of packets trading between Liverpool and America; during that period he crossed the Atlantic upwards of one hundred and eighty times, and was one of the most popular of the commanders on that route.
Split into simpler sentences: From 1842 to 31 Dec.1855 he was connected with the Cunard Line of packets trading between Liverpool and America. During that period he crossed the Atlantic upwards of one hundred and eighty times, and was one of the most popular of the commanders on that route.