He withdrew into the corridor, and began to walk up and down, with that curious feeling of excitement which takes hold of a boy when waiting for an interview on some unknown matter with his head-master. In a few minutes the officers left the room in a body, still talking with animation, and passed down the corridor, away from Jack, towards the street. Judging that Sir John was now alone, Jack returned to the room. The general was pacing the floor with long steps, his hands clasped behind him, his head bent forward in anxious thought. Jack hesitated a moment; then stepped forward. Sir John looked up, and stood with legs apart, evidently not for the moment recognizing his visitor. Then his brow cleared; his features softened in the kindly smile for which he was celebrated.

"Ah! Mr. Lumsden, I think," he said; "I am glad to see you. I fear I have kept you waiting. Yes, I see it is twenty minutes past the hour. Let me waste no time, then. Sit down at the table there."

Sir John seated himself at the opposite side of the table, gave the lad one quick glance, and said:

"Without beating about the bush, are you willing, Mr. Lumsden, to undertake an important and possibly dangerous mission?"

"Certainly, sir."

The answer came without a moment's hesitation, and the general seemed pleased. Then, observing a look of surprise on Jack's face, he went on:

"You wonder at my selecting you? I happened to overhear yesterday an eloquent address in Spanish by an officer of the 95th, and when I came to enquire of Colonel Beckwith, he told me that Mr. Lumsden's knowledge of Spanish had already proved useful. That is how it happened, Mr. Lumsden."

He gave the young officer a friendly smile, and Jack's cheeks flushed with pleasure as the general continued:

"You are the man I've been looking for. What I want you to do is out of your regular duty, but then a knowledge of Spanish is out of the usual officer's acquirements, more's the pity. Do you know French also?"

"A little, sir; just well enough to understand what is said and to make a shift to reply."