I think I may have come across a piece of your family history if tied into the James Doak who came over on the Floridian from Londonberry, Ireland with his family.
The document is in my store (timelesstokensde)on eBay and is the following listing 110975742091.
It is a farewell letter from other citizens of Londonderry that were his friends. Would be interested in hearing back from your if this is part of your family history.
Dave H. - Timeless Tokens firstname.lastname@example.org