"This is indeed a mystery," I remarked. "What do you imagine that it means?"

"I have no data yet. It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. But the note itself. What do you deduce from it?"

I carefully examined the writing, and the paper upon which it was written.

"The man who wrote it was presumably well to do," I remarked, endeavouring to imitate my companion's processes. "Such paper could not be bought under half a crown a packet. It is peculiarly strong and stiff."

"Peculiar--that is the very word," said Jan Manzer. "It is not an English paper at all. Hold it up to the light."

I did so, and saw a large "E" with a small "g," a "P," and a large "G" with a small "t" woven into the texture of the paper.

"What do you make of that?" asked Jan Manzer.

"The name of the maker, no doubt; or his monogram, rather."

"Not at all. The 'G' with the small 't' stands for 'Gesellschaft,' which is the German for 'Company.' It is a customary contraction like our 'Co.' 'P,' of course, stands for 'Papier.' Now for the 'Eg.' Let us glance at our Continental Gazetteer." He took down a heavy brown volume from his shelves. "Eglow, Eglonitz--here we are, Egria. It is in a German-speaking country--in Bohemia, not far from Carlsbad. 'Remarkable as being the scene of the death of Wallenstein, and for its numerous glass-factories and paper-mills.' Ha, ha, my boy, what do you make of that?" His eyes sparkled, and he sent up a great blue triumphant cloud from his cigarette.