Hi Jamie Lee,
David was on the Claudine 1821 [convict], Dinah the Strathfieldsay [free female assisted immigrant], 1834.
Elizabeth [first wife, used name Lowden in her convict records a.k.a. Watson and Wilson] on ship the Henry 1825.
Daughters Janet born in Scotland, Harriet born in Hobart from the first marriage.
Convict records on line at LINC (search Tasmanian Archives, search by surname (or ship) in name search) Free Access.
David had a second family with Dinah in Hobart and Geelong, noted elsewhere in Roots Chat.
M