The victim's face had been badly damaged.

Identification seemed impossible.

Cryer found a silver tooth on the ground.

A local dentist recognised his work immediately.

The tooth belonged to a travelling bookmaker named Edwin Marsh.

Marsh's business partner claimed he had left town.

Cryer searched the partner's office and found blood beneath a loose floorboard.

The partner confessed after learning that the dentist had identified the tooth.

The murder had begun as an argument over gambling debts.