I copied a few pages from a book "New Brunswick " , looks like a history , have no author. A part about "Miramichi'. says that a short time after 1850 the great era of shipbuilding in St John New Brunswick would be over .There had been many Irish carpenters and , lumbermen or failed farmers who went fom New Brunswick to Maine or Wisconsin.
This is in Canada and tells of the early settlers there.
My husband's ancestor was William Crane , his son John spelled name Crain and a priest spelled it Crehan once. I have not been able to trace William to Ireland., would have to breakdown and pay for information and putting it off.
Some of these Irish may have come by way of Scotland or England
The territory had only four missionaries for years so our William Crane/Crain/Crehan who was Catholic and had a Baptist wife , Lucinda/lucretia Smith had all but one of his children's baptisms recorded in 1839 in a Catholic church St. Bruno''s in Van Buren ,Maine. Some with records at St. John Diocese , NB. Some Protestants who believed in children baptisms may have had their children baptized and possibly vice versa.
Clearview Cemetery in Clearview, New Brunswick has both Canadian and Maine persons buried in the Catholic Cemetery there, Crains etc.
William Crane who immigrated from Ireland in 1819 had these children : John Crain married Ellen Phillips; Michael married Elizabeth Duly; James married Mary Reilly ; Richard married Hanna Donnelly ; A girl Lizzie ( as is in the Tarr narrative by Delia Tarr Mahany( look these up as I have submitted more here and there about all of these persons )married John Allen McDonald; William Crane married Mary Murphy; Mary Ann Crane was a spinster who helped her widower brother , Richard ; Susan died young ; Lavina married Richard Murphy .
Persons in that region were Loyalists , Irish, Scot , Hessians settled the St. John region then some moved inland I have seen where persons may have immigrated from ports in America and Quebec, Ontario and New York. Some may have been Irish in the British Army. Later we find that during the Civil War many Irish signed up for bonuses and subsistence, form Canada , Maine or where they could be hired as substitutes being non- US citizens.
Hope some can find something here in New Brunswick , Maine Quebec and Montreal and Ontario from what I saw in that copied piece with the heading New Brunswick or some such book.