Complex sentence: He stayed there for two weeks and then moved northwards, following the coast up to modern Maine, southeastern Nova Scotia, and Newfoundland, after which he returned to France by 8 July 1524.
Split into simpler sentences: He stayed there for two weeks and then moved northwards. He then followed the coast up to modern Maine, southeastern Nova Scotia, and Newfoundland, after which he returned to France by 8 July 1524.