Thanks Brian,
I do not have my copy of you 1851 or 1861 census to hand as I am about to leave for 10 days myself.
However, I recall that young John Christian continued to live with Richard and Margaret Christian in Kentraugh. I lost track of Ann Kermode after 1841.
John Christian Sr. died in 1902 and left a will, which may provide a clue,but I have not yet seen it as the Manhattan Family Research center in Manhattan closed and I am waiting for it to reopen.
Bruce.