The Rivals of Sherlock Holmes

Irked by the grandiose boasts of the warden of Grangemoor Prison, Professor Van Dusen wagers he can escape from the vaunted high-security facility in less than a week.

The mysterious Mr. Laxworthy hires two ex-cons for a job in the south of France. But the self-described 'adventurer' isn't after money.

Amateur detective Eugene Valmont begins by investigating a counterfeiting operation - and ends up uncovering an even more ingenious swindling scheme,

The dangers of revolutionary Russia come to quiet Copenhagen when a countess from St. Petersburg flees to the Danish capital, claiming her brother-in-law is trying to kill her.

Asked to perform an unnecessary amputation, a London surgeon calls on his colleague, Prof. Van Dusen, to learn the reason for the gruesome request.

A recently married Habsburg countess hires dashing private detective Dagobert Trostler to find out who has been sending her obscene letters.

Dr. John Thorndyke stumbles upon an anarchist plot to assassinate a visiting Russian Grand Duke.

When two European spies join a hunting party at an English country house, William Drew of the Foreign Office goes undercover to pursue his own type of prey.

When a fortune in gold bullion disappears from the strong room of R.M.S. Oceanic the ship's purser, Mr. Horrocks, investigates.

After the death of a rich widow, her necklace turns up in a pawnshop run by a young gypsy woman named Hagar. The police quickly zero in on a chief suspect, but Hagar has other ideas about the culprit.

Two leading London barristers disappear during a murder trial, one for the prosecution and one for the defence. Junior defence barrister Charles Dallas searches for his two colleagues.