@Patricia,
Thanks for getting back to me. Yes. I have US Census records including an 1865 Mass State Census.
I have also attached Patrick's Naturalization records showing he was from Leitrim, Ireland.
In most of his records he is listed with the occupation of "Gardener". His son John was a "gasfitter", and he ran his own business.
Both of those occupations made it easier to track them in the records.
You will also notice that in the 1870 US Census both Patrick's family and his son John's family are living together.
I'm not positive about the passenger list, however it does look promising and it is reasonable with the arrival dates listed on the Naturalization records as well as census records I have for John in the 1900's.
I also have the death record for Patrick McLoughlin. Note the occupation of Gardener, his address is consistent with the city directory and his parents names are given as Murtagh and Mary.
I have other records, such as City Directories, and other vital records concerning his children.
I have not found a birth/baptismal record for Arabella. Still looking.
Les