One day, however, Uvo Delavoye, a fascinating and energetic young man despite his ongoing recovery from a tropical illness, asks Gillon to have a look at hole that has appeared overnight in his mother's backyard.

There, they secretly witness the famously pious owner, Sir Christopher Stainsby, hosting a drunken party.

Delavoye blames the party's wild behaviour on the influence of his wicked ancestor, Lord Mulcaster, who once owned all of Witching Hill.

For their second adventure, they investigate the honest lawyer Abercromby Royle who has turned dishonest and strange.

Thirdly, they help the inoffensive accountant Guy Berridge who suffers from impulses of attacking his fiancée.

Fourthly, they suppress the profane story inexplicably written by the reverend's courteous sister, Julia Brabazon.

Later, Gillon encounters Mrs. Ricardo at the ruins of a Temple of Bacchus in the woods, and discusses Delavoye with her.