Hmm. So we have BallyRess in Gelvin and BallyNess in Dungiven. And Leslie Irwins in both. Gelvin is a new name to me.
No, 'Ballyress' is a transcription error- it should read Ballyness. If you look at the scanned image you will see that it does actually say Ballyness-
http://www.census.nationalarchives.ie/reels/nai002823084/
Gelvin is the D.E.D. (District Electoral Division) in the census.
http://www.census.nationalarchives.ie/help/about19011911census.html#whatcontain
Thank you for your patience with those of us unfamiliar with these overlapping boundaries.
I now see how Ballyross came into this conversation. In the 1841/1851 typescript of young Leslie Irvine's family in Dungiven, in the place for townland "Ballyross" is followed by "(Ballyness?)", which I assumed meant Ballyross was thought to be an error in this context. I don't know how to assess from the typescript which would be in error -- the parish or the townland.
I spent some time looking at Ballyness (Dungiven) in the GV Revision Books last night. The changing ownership patterns fit neatly with the wills and other records of life events of Irwins and kin that I have been examining, but one thing surprises me if young Leslie Irwin's family was indeed in Ballyness and not Ballyross. He had four older brothers alive in 1851 (John, Sam, William, and Bob). Names corresponding to the father (Samuel Sr.) and all five sons (John, Sam. Jr., William, and Robert -- the miller, who may not be "Bob" as well as a Leslie) appear in GV, with Leslie appearing remarkably prosperous -- especially for a 5th son.
I am inclined to believe this Leslie Irwin (who died in 1884 with his land disposed of per his will) was not the 15 year old in 1851. (But perhaps he received a windfall inheritance for being the namesake of an earlier Leslie!) I have not yet looked for earlier mentions of a Leslie Irwin in Ballyness, nor have I tried to see when Robert Irwin was first listed as a miller. Robert interests me as I understand he later was at Roe Mills and I am looking for Irwin / Irvine connections among Ballyness and the Limavady and Ballykelly areas.
I have been meaning to ask what "office" or "offices" might be in the brief land descriptions, and now I find "herds" along with home, office, and land. Can anyone enlighten me?