Hello Tom, I found the draft registration on ancestry.com of which I pay for a subscription. Here is a researcher who is also researching this family: Thomas Cummings >email@example.com . I hope that works. You should try to contact him for his sources. Please send me your address to my email at >firstname.lastname@example.org and I will send you what I have found on Thomas' family in the 1860, 1870, 1900, as well as his sister, Margaret(Mrs Edward) Maroney. The info I have lists his parents' names as Thomas Heslin and Bridget Kearney. Even though both came from Ireland I believe from census records that they came over separately. I don't know if they came from the same place. The Thomas Cummings' info states that Bridget came from Londonderry Ireland. I have not found the marriage record for them. Thomas Cummings' info also states that Thomas P Heslin was married to a Mary A Maroney. I wonder if that was the sister of his brotherinlaw, Ed Maroney.
This is not my Heslin family but I hope this is helpful. Mary in CA ************