The Bomb-Makers

Subtitled Being some Curious Records concerning the Craft and Cunning of Theodore Drost, an enemy alien in London, together with certain Revelations regarding his daughter Ella. Contains a half-dozen escapades of Drost the terrorist bomber and the work against him by his daughter, working with the British Secret Service. The stories are:
The Devil's Dice,
The Great Tunnel Plot,
The Hyde Park Plot,
The Explosive Needle,
The Brass Triangle,
The Silent Death