But every time he runs to meet his sweetheart he is appalled by hallucinations over her shoulder.
The cadaverous ghost of the uncle is shown on the screen several times.
It is an appearance visible to the young man and the audience only.

Later the ghost is implied by the actions of the guilty one.

We merely imagine it.

This is a piece of sound technique.

We no more need a dray full of ghosts than a dray full of jumping furniture.
The village in general has never suspected the nephew.