Are you sure it was William/Ann who came to Australia 1839
Familysearch has this;
Bounty Immigrants Index;
Name: William Moon
Birth Year (Estimated): 1815
Age: 23
Native Residence Place: Rolvenden, Kent,
Father's Name: William Moon
Mother's Name: Mary Moon
Spouse's Name: Harriet Moon
Spouse's Residence Place: Rolvenden, Kent,
Spouse's Father's Name: Thomas Millstead
Spouse's Mother's Name: Sarah Millstead
Ship Name: Maitland
Event Date: 06 Nov 1838
Volume: 8
GS Film number: 46875
Digital Folder Number: 4117087
Image Number: 01753
Marriage on FreeREG, unfortunately no Witnesses named;
William MOON
Harriet MILSTED
08 May 1838, St Mary, Rolvendon
Christenings, Rolvenden, Kent;
MOON;
HANNAH, 07 May 1820 to WILLIAM/MARY
HENRY, 15 Dec 1822 to WILLIAM/MARY
WILLIAM, 14 March 1824 to WILLIAM/HANNAH**
JOSEPHUS, 05 Feb 1826 to WILLIAM/HANNAH
DAVID, 09 Nov 1828 to WILLIAM/MARY
(Familysearch.Org)
I doubt that he married at 13 to Harriet Milstead.
HANNAH Moon married William BURDEN, 05 Nov 1842 (FreeREG)
Trish
