If, on the other hand, these Prussian agents on board the Assyrian ever got wind of the fact that the cylinder was in his care, his fate was apt to be a knife between his ribs the first time he was caught alone and—with his back to the assassin.

Two courses, then, were open to him: the most sensible and obvious, to go straightway to the captain of the Assyrian, report all that he knew or surmised, and turn over the paper for safekeeping; one alternative, to hide the cylinder so absolutely that the most drastic search would overlook it, yet so handily that he could rid himself of it at an instant's notice.

But the first course involved denunciation of the Brooke girl. And what if she were innocent? What if, after all, these doubts of her were the specious spawn of facts misinterpreted, misconstrued? What if she proved to be all she seemed? Could he, even though what he had warned her he might be, the greatest rogue unhung, be false to a trust reposed in him by such a woman?

As to that, there was no question in his mind; he would never betray her, lacking irrefutable conviction that she was an employee of the Prussian spy system.

Then how to hide the paper?

Kneeling, Lanyard drew from beneath the berth his bellows-bag, selected from its contents a black japanned tin case containing a rather elaborate though compact trench medicine kit, the idle purchase of an empty afternoon in London. Extracting from its fittings a small leather-covered case, he replaced the kit, relocked and shoved the bag back beneath the berth.

Then, standing over the hand-basin, he opened the leather-covered case. Its velvet-lined compartments held a hypodermic syringe and needle, and a glass phial of twenty-four one-thirtieth grain morphia tablets.

Uncorking the phial, he shook out all the tablets, replaced three, then slid the paper cylinder into the tube; it fitted precisely, concealed by the label of the manufacturing chemist, leaving room for six more tablets. Lanyard inserted four on top of the cylinder, moistening the lowermost slightly to make it stick, recorked the phial, and returned it to its compartment.

Next he dissolved three morphia tablets in a little water in the bottom of a glass, filled the syringe with the strong solution, fitted on the needle, squirted most of the contents down the waste-pipe, and consigned the remaining tablets to the same innocuous fate.

Finally he replaced needle and syringe in the case, let the glass which had held the solution stand without rinsing, and put the open case upon the shelf above the basin.