Nevertheless precisely such a situation had existed to-day. A sharp-eyed young fellow, not much less than sixteen years of age, had stood for all of ten minutes in practically the position indicated. Not until the automobile and its owners had departed did he also leave, walking hastily down the alley and keeping much closer under the cover of the high, tight-board fence than would seem entirely necessary. The young man was too respectable in his general appearance to be mistaken for a tramp or other type of vagabond loitering about for no good purpose. Nor had he any of the usual sneak-thief characteristics, suspicious as his actions were. Only a half-surly, half-defiant expression about his hawk-like eyes and a scowl above his heavy brows gave a clue to his thoughts and purposes. It was easy to guess that in some way he had suffered a disappointment. At the corner of a residence street upon which the lad presently emerged, his face lighted up. Smiling, as if he had concluded to think better of the matter whatever it may have been, he spoke quite aloud, yet in a low tone: "'And they piled three stones on top of one another to mark the place. One was a big field stone, another a flat stone and the third, which was at the top, was conglomerate.'" And then a moment later, "'Conglomerate! All full of pebbles like coarse gravel!' As if any man didn't know 'conglomerate'!" There was something coarse and rasping in the way the boy repeated the latter phrase of the words he had overheard at the green and yellow shed. It suggested both maliciousness and mischief. His further language as he spoke in undertones to no ears but his own was confirmation of such an opinion. "Plenty of time yet. Guess wherever any old thirty horse-power motor can go, a forty-five can follow! Confound those little beasts! I don't see where they can be!" That the young man's latter remark, even less amiable than it was complimentary, had reference to someone whom he expected to see, was made apparent a few minutes later when a heavy car of the roadster type, too lumbering to be of the best, came suddenly around the corner and stopped at the curb near him. The machine carried two young fellows of about his own age. "Been looking for you everywhere, Pick," said one of the two--he at the wheel--"You said you'd go out Chestnut. What you doing way down here on the avenue?" "Said nothin' of the kind," growled the sharp-eyed one. "I said I'd meet you right here on Green Avenue. Been looking for you till--" "You did _not_!" spoke the other of the two in the car. "I know what you said!"