Complex sentence: Parliamentary papers 1835:75 was a schooner-of-war in the Royal Navy employed in anti-slave trade patrol from 1826 until 1834, when she wrecked on a reef with the loss of 70 Africans that had been rescued from a slave ship.
Split into simpler sentences: Parliamentary papers 1835:75 was a schooner-of-war in the Royal Navy. She was employed in anti-slave trade patrol from 1826 until 1834, when she was wrecked on a reef with the loss of 70 Africans who had been rescued from a slave ship.