My info shows that John Cawthra (1789-1851) married Ann Wilson (1799-1831) January 14, 1821. One of their children was named Mary. She married a Mulock. There were two children, William and unknown. William Mulock married Sarah Ellen Crowther. They had one child, Cawthra Falconbridge Mulock, died Dec. 11, 1998 in Newmarket, Ontario, Canada. Hope this helps.