Edward Kitching

My Edward Kitching was born in Whitechapel London in 1819.
I have been trying unsuccessfully for years to find out how and when he got there. He married in Brisbane in 1853 to Ann Fahy, an Irish Orphan Immigrant. His profession was shown as Sergeant of Police. They had 6 children before moving to Wellington New Zealand in 1865 where three more children were born. The oldest child Thomas henry kitching was killed in the Napier earthquake of 1931