"Before you have the next prisoner brought in we'll arrange a little dramatic episode," said the flagship's lieutenant. "I'll order my men to fire a volley."

"By all means," assented Whittinghame. "I quite follow you."

Having given his boat's crew orders for each man to break out a bullet from a cartridge and load with the blank, the lieutenant told the men to fire. The sharp crack of musketry resounded from one end of the airship to the other.

When the second prisoner was ushered in he was pale and trembling. He was now fully convinced that the faith he had in the Englishman's reluctance to take life was a mistake, for in his mind he felt certain that the volley he had just heard meant the summary execution of his predecessor.

"Pay attention," exclaimed Gerald Whittinghame sternly. He had been deputed to act as cross-examiner-in-chief, and his intimate knowledge of Spanish stood him in good stead. "Pay attention: you have been caught in the act of committing an outrage on the property of a friendly nation; for it is useless to attempt to excuse yourself on the grounds that you were unaware of the settlement of the differences between Great Britain and Valderia. We mean to take extreme measures with you, unless——"

Vaughan's brother paused in order that his words should carry weight, while the incompleted sentence indicated that even yet the prisoner might expect clemency.

"Unless you tell us all you know of the whereabouts of Señor Reno Durango. Do not attempt to deceive us. Already we know a great deal, so if you tell us anything that we know to be false you will have good cause to wish you had held your tongue."

"Señor, I speak the truth," replied the Valderian. "I have been made to do what I have done. I swear it——"

"We do not ask you about your part of the affair," interrupted Gerald. "What we want to know, and what we insist on finding out, relates to Durango."

"Señor, he is not in Zandovar."