Peter had been staring into space only half at tending to their prattle. Bobby jogged his elbow.
"Pay attention, Peter! We 're waiting for orders. You ought to detail two plain-clothes men to watch the gates, and I think it would be well to shadow Vittorio. He's a foreigner, you know; maybe he b'longs to the Black Hand. I should n't wonder if he was planning to blow up the stables. Only," he added, as an afterthought, "it's sort of hard shadowing a man who stands by the hedge all day talking to Annie."
Peter's frown darkened as his gaze sought the rustic bench under the apple tree. He had little spirit left for the boys' diversions, but he roused himself to say:
"I 'll turn the details o' the case over to you, Master Bobby. Guard the gates, an' shadow anyone that seems suspicious. I'm drivin' Joe's wife to the hospital this afternoon; ye can report at six o'clock, when I gets back."
The four rose and saluted; they held a whis-
