Hi KG
Yes Rebecca is another sister and one I have not reached as yet. And one that now might just be the answer to a McCracken FTDNA match who I think has family in the same area. So it is now very tempting to skip over to Rebecca.
I have finally made a list of the McIlroy family, though I am still to complete the Hart line and will have to return to the Holmes family to delve deeper, now that I know where they belong.
This going to take some time, and maybe Irishgenealogy will have posted the rest of the scanned death images before I have finished.

Family of James McIlroy and Mary Henry
Mary Jane McIlroy b 3 Nov 1833 m 1853 (at Leitrim) to Thomas Holmes d 1890
Nancy McIlroy b c1837 m 1855 (at Leitrim) to William Hart. d 1904
Eliza Ann McIlroy b c1840 m 1860 (at Leitrim) to Archibald Kirkpatrick. d 1920
William Henry McIlroy b 7 Oct 1841 d 1931
James McIlroy b 8 Jun 1843
Margaret McIlroy b 7 Dec 1844
John McIlroy b 7 Dec 1844
Isaac McIlroy b 10 Feb 1848
Rebecca McIlroy b 10 Feb 1848
John McIlroy b 29 Apr 1850
Brice McIlroy b 22 Jul 1853