Ricker smiled as he presented what appeared to him to be a poser.

“Only half a truth,” cried Henri, “with the worst half added by you. We did intend to offer Roque a saving turn in one of his own machines, for old acquaintance sake, but not in the connection that you put it. For even that much, I know, you have us against the wall, but let me tell you, sir, if the worst comes to the worst we will confess our part to our friend Colonel Malinkoff and he can weigh the testimony that the three of us can give.”

This dropped Ricker, not only to a seat on a workbench, but in point of argument. Just back of him were the battered remains of a time-clock, with twisted wires still attached, for the custody of which he was responsible to the authorities, and about which, as an expert, he was expected to report the next morning. It was a part of the infernal machine dug out of the ruins of the war depot!

Both Billy and Henri were quick to observe that the silversmith was about all in, so to speak, and more than willing to play quits.

The man who had missed his reckoning an hour in the setting of a spring was not now disposed to perpetuate the error!

As the boys were about to push aside the curtain and get out into the open, a small bell suspended from the ceiling of the workroom softly tinkled. Ricker was on his feet in an instant and holding a finger to his lips.

At the store entrance some rapid-fire Russian was being exchanged, and Billy took the liberty of peeping through a slit in the drapery behind which he was concealed. The look was a blood freezer.

Nikita, the Cossack, and the hairy clerk were having it hammer and tongs about something, when all of a sudden the red rider unhanded one of his heavy leather gloves and with it struck the queer shop attendant full in the face.

Of all the malignant looks that Billy had ever seen on human countenance the blackest was pictured in the glaring eyes of the fierce servitor, who, retreating before the assaulting Cossack, had backed against the counter.

Ricker, catching the drift of the quarrel in front, turned quickly, and noiselessly pushed aside, in well-oiled grooves, a solid-back plate case, and to the opening revealed in the wall he beckoned the boys. “He is evidently after you, for some reason,” whispered the silversmith; “claims that he trailed you here. Is he friend or foe? Tell me quick.”