Complex sentence: In 1839 he became the investigating officer into the slave trade on the west coast of Africa, in 1847 the secretary for the West Australian colonies, and in 1850 he was named secretary of the Office for Loan Funds in Dublin.
Split into simpler sentences: In 1839 he became the investigating officer into the slave trade on the west coast of Africa, in 1847 the secretary for the West Australian colonies. He retuned to Dublin and in 1850 he was named secretary of the Office for Loan Funds in Dublin.