Complex sentence: After Bachelot and Short arrived in Honolulu in the spring of 1837, they spent 13 days on the island before being confined to the ship on which they had arrived, the "Clementine".
Split into simpler sentences: After Bachelot and Short arrived in Honolulu in the spring of 1837, they spent 13 days on the island. They were confined to ship on which they had arrived, the "Clementine".