Brenda, the William Merdue in WA was the son of this couple.
South Australian Marriages, Registrations 1842-1916 Groom: William John SMITH Bride: Mary Ann ROWE [nee BULL] Date: 1884-12-16 Groom Age: 30 [b. c1854] Status: S Groom's Father: William Mirdue SMITH Bride Age: 29 Status: W Bride's Father: Jacob BULL Place: BC Church Willowie District: Fro / Book/Page: 141/1123
This in turn confirmed the following arrival in SA of "your" SMITH family. http://www.theshipslist.com/ships/australia/taymouthcastle1855.htmhttp://www.theshipslist.com/ships/australia/taymouthcastle1855.htm Smith William 25 Carpenter - Middlesex ship's schoolmaster Amelia 23 Amelia 1[nearer 2 yrsthan 1yr?] William inf[who married Mary Ann BULL]