_First Earl of Roscommon._--Can you or any of your correspondents put me on
any plan by which I may obtain some information on the following subject?
James Dillon, first Earl of Roscommon, married Helen, daughter of Sir
Christopher Barnwell, by whom he had seven sons and six daughters; their
names were Robert, Lucas, Thomas, Christopher, George, John, Patrick.
Robert succeeded his father in 1641, and of his descendants and those of
Lucas and Patrick I have some accounts; but what I want to know is, who are
the descendants of Thomas (particularly), or of any of the other three
sons?
Lodge, in his _Peerage_, very kindly kills all the sons, Patrick included;
but it appears that he did not depart this life until he had left issue,
from whom the late Earl had his origin. If Lodge is thus wrong in one case,
he may be in others, and I have reason to believe that Thomas left a son
settled in a place in Ireland called Portlick.