James Lewis: Home Child?

I came across the following record of an abjuration and baptism in the parish register for St. Isidore, South March (Carleton Co., Ontario):

On the twenty sixth day of January one thousand eight hundred and eighty three, I the undersigned curate of this mission baptized James born about the month of January (in England) Eleven years ago of the lawful marriage of Mr Lewis and a mother whose name cannot be arrived at. The godfather was James Kirwan and the godmother Mary Kirwan. J.A. Sloan, pt.1
I don’t know anything about the Kirwans, except that they were Irish Catholic farmers in South March.

1
St. Isidore Roman Catholic Church (South Marchl, Ontario), Register of Baptisms and Marriages, 1861-1968, James Lewis B2 [1883], database, Ancestry.ca (http://www.ancestry.ca/: accessed 8 October 2010), Ontario, Canada, Catholic Church Records (Drouin Collection), 1747-1967.