I have found an obit for Mary Ahearn Mahoney. Says in her obit she came to america and lived and went to school in Millbrook, Dutchess county.
I saved a copy of the obit but I cannot attach pdf files here.
I found it at OldFultonNewspapers. I am sure there are many more of the family obits there too. I seen one for Lawrence and his wife, but Mary had the info about growing up in Dutchess County