My James Kelly is one of my brick walls. I believe that he emigrated to Canada and then onto the United States. His first child was also born in Canada and the rest in Jefferson County, NY. It was less expensive for some reason to take the ship to Canada than to come directly to the US. So you may want to look at Canadian ships lists, something I haven’t gotten around to yet. I think it more likely that John came over in 1859 than 1849 but you could check the 1851 Canadian census. Another resource you might look for is an old history of the county he settled in, they often listed the rolls of those that served in the Civil War and that might give you a better idea of whether or not to spend the big bucks on a Civil War pension file that may or may not be his.