On the IGI a Christopher Harrison's wife is listed as being Elizabeth. I have an official document from Australian record which states my Christopher Harrisons wife name was Margaret Cow.
So therefore there could be two Christopher Harrisons or the names on the IGI could be wrong.
If anyone can confirm the Christopher Harrison on the IGI is feel free to contact me
Sources below from Official Births deaths and marriages Australian Government and shipping records
1. Christopher Harrison married Margaret Cow Date unknown
One son
James Harrison born about 1817
James Harrison married 1st Anne Gibson
Children
William Gibson Harrison
Christopher Harrison (My ancestor)
James Harrison married 2nd wife Janet Berry 1871 Geelong Victoria
James Harrison died The Springs Waubra Victoria 1883
2. Christopher Harrison married Selina Smith (daughter of Thomas Colmer Smith and Jane Rowett) 1863
3. Their daughter Miriam Harrison married Walter Prayle (My ancestors) 1895
Christopher Harrison came to Australia with his parents and brother in 1852
Source Public Record Office of Australia
Assisted British Immigration
Index to Registers of Assisted British Immigrants 1839-1871
Scanned documents and photos here
http://www.angelfire.com/planet/harrisonfamily/pics/