He began the practice of law in 1763 at Berwick , now in Maine , and continued in the practice when he moved to Durham , New Hampshire in 1764 .
Sullivan read law with Samuel Livermore of Portsmouth , New Hampshire between 1758 and 1760 .
Sullivan began the practice of law in 1763 at Berwick , now in Maine , and continued in the practice when Sullivan moved to Durham , New Hampshire in 1764 .
Sullivan read law with Samuel Livermore of Portsmouth , New Hampshire between 1758 and 1760 .