She was convicted on the 9 July 1785 for robbing a purse full of cash and prommissary notes containing 630 shillings.
Due to James being a bricklayer and architect they lived together in a beautiful house, had a high social status and were quite wealthy due to James's salary being 50 pounds.
She outlived her husband, who died on 24 March 1804 from pneumonia, leaving her with three young children—the oldest being 13 years old.
She lived with her children but didn't marry again and later was granted a conditional pardon on 23 February 1811.
In fact, James and Sarah never married, because it was known that James had left a living wife (Jane Marks; married 9 December 1782) and several children in England when he was transported.