Hey Rick, if you go to my family tree, the land deed is saved as a profile picture for Hugh Lafayette. I am not 100% sure of it's accuracy, but it is for the Tuscaloosa area, where Hugh lived at that time. I searched online for any other Lafayette's in the area at that time and didn't find anything to convince me that the document was not our Hugh Lafayette's.
I came across his name in the census records (1850, 1860 and 1870), all of which are saved to his profile in my tree. The 1860 and 1870 census list Daddy Hughie's father, Charles Vincent as the son of Hugh. The census records mostly state Ireland as Hugh's country of origin, but one lists it as Scotland. I have also searched the passenger lists to see if I could find when he came to America and where he sailed to, but you can only do so much online.
I assume that it was Momma Dee that told you about Vincent sailing when he was young. It is possible because the only record I have of him is the census, and since it was said that he sailed from age 15-20, that would put him being gone from 1872-1877; he would have been in Mississippi for both the 1870 and 1880 Federal Census.
Hope this helps. Let me know if you need a link to my tree.