I have a pretty fair amount of information on Bridget and Christopher, though much of it came from Alan Combs, who is married to Jane Catherine Geoghegan, and so must be an uncle or great uncle of yours. My family list does not go as far as your generation among the Geoghegans -- how do you track back to Christopher, through Thomas Edmund?
Anyway, I will be happy to supply as much info as I have. My records indicate that Christopher was born in Meath. Bridget was born in Co. Sligo, in Gurteen. I don't believe they met until they got to New York (Bridget arrived, probably, in 1893, though some records say 1896), and they got married there. I am the grandson of Catherine Scanlon, her sister, who also married in New York, somewhere around 1900.
Let me know if you want more, and we can try communicating more directly through email.