I would say that your Leonard Bernard is not the same one as mine.
There is no son named Herbert.
I have my info confirmed by the Griffith's Valuation ( not sure what year off hand as I don't have my files handy) BUT here is my question to you:
Is your ancestor from Castleblaney?? If not from Castleblaney, do you know where ( more than co. Monahan ) that they are from?? Although you can certainly search each townland, although it is teadious work, (but I have done it myself). You can often find interesting info doing it.
Do you have dates of birth, death etc. or at leat approximate dates.
There are other Hamills, in the area & I know some are related & I still have relations there that I am in touch with. So who knows our Bernard's could have been brothers or cousins.
Have you looked at the 1901 & 1911 Irish Census yet??
Make sure you check there, it is a treasury of info & there is almost monthly more info going up by Irish Genealogist.
Keep in touch with me. If I see anything of interest to you, I will drop you a note & let me know of your undoing work!!! I love to hear success stories!
Ellen. : )