Joseph Muller, Secret Service detective of the Imperial Austrian police, is one of the great experts in his profession. In personality he differs greatly from other famous detectives like Sherlock Holmes and Monsieur Lecoq. Muller is a small, slight, plain-looking man, of indefinite age, and of modest disposition but his methods of detection are no less than any of his contemporaries!

Contents:

The Case of the Pocket Diary Found in the Snow

The Case of the Golden Bullet

The Case of the Registered Letter

The Case of the Lamp That Went Out

The Case of the Pool of Blood in the Pastor's Study