Dick held up the weapon that the carpenter had hurled at Private Mock. "It is a 45-caliber, United States Government automatic pistol," said Colonel Cleaves. "Exactly, sir; and the spy I have mentioned had it in his possession. How he obtained it, I do not yet know, but I hope to find out. And now, sir, I will tell you what happened and what action I took." Thereupon Captain Dick Prescott narrated the amazing adventure of the evening, winding up with: "So, sir, I have placed Private Mock in arrest at the guard-house, and through his detention there I hope to gain the clues that shall lead us to the ferreting out and arrest of the whole crew of German spies at Camp Berry!" CHAPTER VII AT GRIPS WITH GERMAN SPIES New barracks buildings continued to spring up at Camp Berry. Drafts of men for a National Army division began to arrive, besides a brigade of infantry, a regiment of field artillery and a machine-gun battalion of regulars. Brigadier-General Bates arrived to take command of the regulars, while Major-general Timmins assumed command of the National Army division and became commanding general of the camp as well. New batches of recruits, constantly arriving for the regulars, soon gave the Ninety-ninth an average of a hundred and eighty men to the company, or forty-five men to each platoon. Drill went on as nearly incessantly during daylight as the men could endure. "In my opinion it won't be very long before the Ninety-ninth goes over and reports to General Pershing," Dick told his chum. "At the rate our ranks are being filled up we'll soon have a full-strength regiment." "But most of our men are still recruits," Holmes objected. The regiment really isn't anywhere near fit for foreign service." "It won't be so many weeks before we're ordered abroad," Dick insisted. "Wait and see whether I'm right." Wonderful indeed was the speed with which buildings were erected. The record time for constructing a two-story building with an office, supply room, mess-room and sleeping quarters for two hundred and fifty men was ninety minutes! Fast, too, was the work done by the Regular Army regiments, which had this advantage over the National Army regiments, that most of their officers were trained regulars and a large proportion of them West Point graduates. Of the sixteen men made ill by eating powdered glass not one died, for the glass had been ground too fine to do the utmost mischief. However, the camp was alarmed, and all food was kept under close guard and was regularly examined with care before being served. Soldiers bearing German names were in some instances suspected, and unjustly. Officers tried to undo this harm by talking among the men. Yet all wondered what would be the next outbreak of spy work in camp. Private Mock, sentenced to two weeks' arrest for being off the reservation without leave, served his sentence moodily, usually refusing to talk with his fellow-prisoners.