"Will you take my seat?" he said politely, handing me his reading-glass. "A little drama will commence in a few minutes. It will interest you!"

I gave him a glance of interrogation as we exchanged chairs.

"We shall be in Cornwall to-morrow, and in advance of our friends," he whispered. "But, in order that we may carry out our preliminary inquiries quite undisturbed, I have thought out a little plan by which, if all goes well, Major Helzephron will be detained in London for a day or two—you will see."

Trembling with eagerness I stared down at the mirror.

The periscope was perfectly focussed. The addition of the reading-glass made everything perfectly clear.

Two men in evening clothes were seated at a table. Their heads were close together, and they were talking earnestly. One was a tall, handsome boy of two-and-twenty, with a fair complexion and a reckless, dissipated cast of face. Young as he was, evil experience had marked him, and his smile was that of a much older man.

But I scarcely cast a glance on him as I stared at the coloured, moving miniature of "Hawk Helzephron." The man's face was deeply tanned; above the brows a magnificent dome of white forehead went up to a thatch of dark red hair—the forehead of a thinker if ever I saw one. The face below was seamed and lined everywhere. The thin nose curved out and down like that of a bird of prey. The mouth was large, well-shaped, but compressed, the chin a wedge of resolution. And, as he talked, I saw a pair of slightly protruding eyes, cold and fierce. The whole aspect of the man was ferocious and formidable to a degree.

"Watch!" whispered Danjuro.

I watched, and this is what I saw.

Into the picture came a thick-set, brutal-looking man, with a blazing diamond in his shirt-front. He was passing Helzephron's table when his dinner jacket caught a wine-glass and swept it to the floor.