The guest shook her parasol at him and ordered him back to the house. Lad obeyed no orders, save those of his two deities. Instead of slinking away, he sat down beside the child; so close to her that his ruff pressed against her shoulder. He did not lie down as usual, but sat--tulip ears erect, dark eyes cloudy with trouble; head turning slowly from side to side, nostrils pulsing. To a human, there was nothing to see or hear or smell--other than the cool beauty of the nook, the soughing of the breeze in the willows, the soft fragrance of a June morning. To a dog, there were faint rustling sounds that were not made by the breeze. There were equally faint and elusive scents that the human nose could not register. Notably, a subtle odor as of crushed cucumbers. (If ever you have killed a pit-viper, you know that smell.) The dog was worried. He was uneasy. His uneasiness would not let him sit still. It made him fidget and shift his position; and, once or twice, growl a little under his breath. Presently, his eyes brightened, and his brush began to thud gently on the rug-edge. For, a quarter mile above, The Place's car was turning in from the highway. In it were the Mistress and the Master, coming home with the mail. Now everything would be all right. And the onerous duties of guardianship would pass to more capable hands. As the car rounded the corner of the house and came to a stop at the front door, the guest caught sight of it. Jumping up from her seat on the rug, she started toward it in quest of mail. So hastily did she rise that she dislodged one of the wall's small stones and sent it rattling down into a wide crevice between two larger rocks. She did not heed the tinkle of stone on stone; nor a sharp little hiss that followed, as the falling missile smote the coils of a sleeping copperhead snake in one of the wall's lowest cavities. But Lad heard it. And he heard the slithering of scales against rocksides, as the snake angrily sought new sleeping quarters. The guest walked away, all ignorant of what she had done. And, before she had taken three steps, a triangular grayish-ruddy head was pushed out from the bottom of the wall. Twistingly, the copperhead glided out onto the grass at the very edge of the rug. The snake was short, and thick, and dirty, with a distinct and intricate pattern interwoven on its rough upper body. The head was short, flat, wedge-shaped. Between eye and nostril, on either side, was the sinister "pinhole," that is the infallible mark of the poison-sac serpent.