I have been looking for immigration records for my 3rd great grandfather, John Wilson. He emigrated from County Down, Ireland to the US in 1812, according to a family datasheet whose author is unknown. This datasheet lists his wife as "a daughter of Peter Taylor". (Her name is Mary Ann.)
John Wilson was born in 1800, according to his headstone. If he was 12 when he came to the US, I assume he was traveling with family. I cannot find his mother or father's name, the father was "killed in the second war with England" (according to datasheet). I cannot find any Wilson family in ship records for that year, or even close to that year. I have looked at immigrantships.net - but maybe I'm expecting too much for records that old!
When I look at historical records for 1812, they state that immigration was limited, due to the war, which makes sense to me.
I have found another family in Jefferson County, Ohio, which is where John lived most of his life, who came to the US in 1918. Unfortunately, I have also found about 4-5 different John Wilson's living in the same area at the same time. This makes my research difficult, to say the least, but I have been able to find estate records, children, newspaper publications, etc. so I have John well documented. I just can't find where/when he came to the US!
I do want to mention that Jefferson County, Ohio has a great presence online as far as naturalization records, birth/death/marriage, probate, etc. and I have poured through those amazing records one page at a time, looking for information!