Continuity: In the first scene where the wreckers are assembled at the inn, Dandy's many tattoos are shown in close-up and are featured prominently as he recalls a past love affair commemorated in one of them. Yet in one tableau view of the gang from that same scene, there's not a single tattoo to be seen on his chest under his open coat.
Revealing mistakes: After Trehearne and Mary escape from the villains by swimming out to their boat, they wind up seeking refuge at Pengallan's home. While still in his soaking clothes, Trehearne pulls a dry folded piece of paper from his pocket.
Continuity: When Trehearne and Sir Humphrey are sharing a drink, the Squire drinks holding the glass with his left hand and sets it down using his right.
Continuity: A wave comes up, about to crash over the left side of the ship (in the opening scene). In the next shot, the wave is coming from behind.
Continuity: When Mary takes off Jem's rope, she is on his left side. In the next shot, she is on his right.