My Great Great Grandfather Phillip or Philip Brogan (1844 - 1898) spent his childhood in County Donegal, Ireland, (Gweedore area / born in Lunniagh) and moved to the U.S., apparently after the Civil War, ultimately setting in Oregon. His younger brother Thomas (born 1849) left Ireland for the mines in Pennsylvania at age 12, where he worked for 7 years, obtained U.S. citizenship, left and lived in New Zealand and later moved with his wife and many children to Philip's homestead in Antelope, Oregon, in 1892.
In ancestry.com, I've located three (possibly four) entries regarding my Great Great Grandfather Philip or Phillip Brogan, in the U.S. and Canada, Passenger and Immigration Lists Index, 1500s - 1900s.
Three appear to be Naturalization records / Declaration of Intent. There is an entry from 1853 and another from 1856, both with the spelling Philip, and another listing in 1868, with the spelling Phillip. The source of at least three of these documents is W.P.A., Project No. 20837. [Harrisburg:] Pennsylvania Historical Commission, [1940). 25 vols. in 11.Vol.1.Letter B. 345p., page 261 (same page for each of the three entries). Source publication code on the three as listed in ancestry.com is 9291. I believe my GG Grandfather used both spellings of his first name: Phillip -- on his tombstone. Philip while in Ireland.
How do I confirm whether some or all of these three records pertain to my GG Grandfather? Also, how do I obtain copies of the ones that do pertain to him?
Additionally, I'm wondering if my Great Great Grandfather might have briefly come over on a famine ship as an infant and returned to Ireland for his childhood, before later moving to the U.S. to obtain a homestead in Oregon after the Civil War. The Philadelphia Passenger and Immigration Lists, 1800-1850, Immigration and Travel Lists (and the Pennsylvania Passenger and Crew Lists, 1800-1962), both list an arrival on 3 July 1845 on the Ship Agenora, for Philip Brogan (who was #176 on the list). The ship departed from Londonderry (and Liverpool), before arriving in the U.S. Londonderry would have been somewhat close to his townland. Ancestry.com indicates this information about the ship and the infant is found at: National Archives Series # 425, Microfilm 62, List 89.
In trying to determine whether the infant Philip Brogan listed on the Ship Agenora, might have been my GG Grandfather, I will note that there are others on the ship who may or may not have been relatives or neighbors, but not necessarily his parents. Not all entries are legible. I see no other Brogans listed, but I do see a M'Gee, which was his Mother's maiden name. His Mom was Margaret rather than Mary. He might have been about 1 1/2 years old, whereas one list shows that the infant was 2 years old.
In conclusion, I'm really hoping to find out: (1) if it was him on the famine ship and (2) which of the Naturalization / Declaration of Intent documents are about him and how to obtain the relevant ones. What is the best way to find all of this out? Thanks.