Goofs

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.

When Mary takes off Jem's rope, she is on his left side. In the next shot, she is on his right.

In the scene where Jem and Sir Humphrey are tied up, the chain that connects the two sides of Sir Humphrey's cloak is high on his chest in some shots and right below his chin on other shots.

As Jem and Sir Humphrey Pengallan are being tied up, one of the men adjusts Jem's scarf and it's almost horizontal but in the next shot it's vertical.

When Jem is talking to Sir Humphrey's servants to ask where he is, there are no shadows on his back in shots from far away but during the close-ups, there are many shadows of tree branches on his back.

When the Squire writes the letter to the captain at Truro, he writes at least four lines of text after dipping the quill pen in the ink just once. In reality, the pen would have to be dipped after every two or three words, and then wiped on the rim of the ink pot to avoid ink blots.

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.

When Trehearne and Mary hide behind a rocky outcrop after swimming away from the cave, the outcrop moves back and forth with the motion of the water.

Early in the film as the ship is being steered the helmsman is turning the wheel but the sheave (in front of the wheel) around which the rudder controlling rope is wound is not moving, indicating that the wheel is an inoperative prop.

Sir Humphrey Pengallen is said to be an old friend of King George IV, who has recently acceded to the British throne. However, the film takes place in 1819 and George IV did not become king until January 29, 1820.

One of the wrecking gang whistles the Irish ballad "The Spinning Wheel" at various points. It was composed in the 1850s, 30+ years after the action of the film.

When the stagecoach moves away leaving Mary with her case, alone on the moor, a character, presumably a stage hand who had held the horses, is seen diving out of shot to the left of screen,

Toward the end of the film as the ship is heading for the rocks, someone yells "Hard a port!" The helmsman then turns the wheel to starboard and then the ship is seen moving to starboard.

When Jem and Sir Humphrey go to Joss' house, Jem knocks at the door with the butt of his pistol. That would have been very dangerous, given the notorious unreliability of the pistols from that era.

When Joss answers the door late at night (at the 51 minute mark) he carries a flintlock pistol for protection. However, the pistol is only half cocked and would be useless; flintlock pistols can only fire when the hammer is pulled back to full cock.