Complex sentence: These men labored among the Chinese and Malays of the Straits Settlements, but from 1842, up to his death in 1846, Mr. Abeel devoted himself to establishing a mission in Amoy.
Split into simpler sentences: These men labored first among the Chinese and Malays of the Straits Settlements. From 1842 to his death in 1846, Mr. Abeel devoted himself to establishing a mission in Amoy.