Who is the man in the jail? He stole one of Flora MacDonald’s emeralds from her necklace which suggests he was actually after the stone and not the necklace. As we know, gem stones are needed for steering and protection through the stones.
Claire hears him whistling “Colonel Bogey March” which was a song that came about in 1914 but became the anthem of WWII. This proves the man isn’t from the 18th century.