Thank you Geralynn and Paul for your helpful answers. The online version I use for Griffith's does nothave the introductory pages you mentioned, but the last townland mentioned in this parish does havethe date - December 1850. I had not noticed this date before, perhaps because I seldom am lookingat the last townland listed in a parish so I appreciate having that information. I have used Tenure and House Books before, either on FHC films or at the National Archives in Dublinas well as Cancelled Land Books, also on FHC films or at the Valuation Office in Dublin. I have John's information on my "to-do" list now for both pre- and post-Griffith's land information. Although some people were baptized in a parish other than the one where they lived, I have notfound that to be the case with my family so far. The idea that John was in Knockainy in 1850 and then had a child baptized in Glenroe and Ballyorgan parish in 1855, opens the door to John being the teacher in Glenroe parish in 1855. It also means, since the youngest child was born in Ballylanders parish, that he might have moved there the year the youngest child was born. He left the Glenroe School, and the author of the book on the school surmises where he went. It is possible he left Glenroe and began teaching in Ballylanders. I am quite sure he is not the one who emigrated to Australia, as the author proposes. Thank you again, very much, for your responses.