Complex sentence: Gawley and his wife and children arrived on the "Pestonjee Bomanjee" on 12 October 1838, after a four month journey via Tenerife and Rio de Janeiro.
Split into simpler sentences: Gawley and his wife and children arrived on the Pestonjee Bomanjee on 12 October 1838. They had made a four month journey via Tenerife and Rio de Janeiro.