Re: William Ross of County Derry
I research the Irish Family History Foundation's database. It contains 12,700,000 surviving rcds for abt 70% of Irish counties. Rcds are increasingly sparse B4 1840, rare B4 1800. Co. Derry and Donegal were recently added to this database.
For Marg(aret) Ross and the other named children B ????, Co. Derry, with a father forenamed William, I found NO B rcds within your timeline. Transcription of Co. Derry's rcds is largely complete. Few additions are expected.
Google the Foundation's name to lead you to this database. Register, opt to be notified as rcds are added and browse. Pls post your search results to my genforum msg.
Hope this helps. Good luck.