Edgar Wallace 
Just Men of Cordova 

In Spain, the Just Men stalk a mysterious English doctor The beggar limps toward the outdoor café looking for a familiar face. He finds Manfred sitting alone and tells the gentleman to follow. Only when the beggar leans close and speaks in his true voice does Manfred recognize him as Gonsalez, master of disguise and an ally in the fight against crime. When they are joined by the rakish Poiccart, the Three Just Men are together at last. Feared throughout Europe for their willingness to kill those criminals whom the law cannot touch, they have come to Cordova in search of an English doctor—but they will soon discover that it is he who hunts them. The doctor is in the employ of Colonel Black, a financier and would-be Napoleon who seeks a particular Cordovan poison that cannot be detected by modern science. The fate of Europe hinges on a single vial of the lethal liquid, and the Just Men will be waiting when it falls. This ebook features a new introduction by Otto Penzler and has been professionally proofread to ensure accuracy and readability on all devices.  The Just Men of Cordova is the third book in the Four Just Men series, but you may enjoy reading the series in any order.