"Best let 'em bide. They be doing the ground good," said Master. "It bain't nothing serious, varmer," he went on. "Yew and Mary will be well again to-morrow. Don't ye drink and 'twill be all right. The peas will die of what us calls instantaneous combustion. If yew was to swallow anything to pizen 'em 'twould pizen yew tu. Aw now, you might rub a little ammonia on your bellies just to mak' 'em feel uneasy-like. I'll get ye a drop in a bottle. Nothing's no trouble, varmer." "It taketh a scholard to understand it," said Mary. "When he putched a-telling I couldn't sense 'en, but I knows now it bain't serious. A brave larned man be Master. There bain't many like 'en." The invalids were pretty well by that evening. Their pains were departing, and Mary was able to hunt again for Old Sal and bewail her lost groceries, while Peter turned his attention towards establishing electric light into the two hut-circles. He had brought back from Tavistock two little bottles with taps, hairpins, and bits of rope complete, also mystic circles made of china, which, he had been informed, were used for securing the completed article to the roof, and nearly a mile of thin wire, which he had picked up very cheaply, as it was getting rusty. The wire had excited Mary's amazement, but Peter refused to give her any information concerning it. He had enjoyed an instructive conversation with the man in the shop, who perceived that Peter was a savage, but did not on that account refuse to sell him the required articles. Peter asked how the light was made, and the answer "with water," or words to that effect, so stunned him that he heard nothing for the next few moments. If it could be true that fire and heat were made out of water he was prepared to believe anything. The man seemed to be serious and not trying to make a fool of him; for he went on to explain that the light was conveyed from the water by a wire which communicated with the little bottles--he showed Peter that what he had mistaken for a piece of rope was in reality twisted wires--over any distance, although more power would be required if the house to be lighted was far from the water. The word "power" was explained to Peter's satisfaction as meaning a strong current, preferably a waterfall. The entire art of electrical engineering became clear to Peter at once. He remembered how the ignorant little girl in the lodging-house had mentioned the telegraph wires which had been put about the house. The child could not be expected to understand what the wires were for--Peter had not much tolerance for such stupidity--but it was evident, after the shopman's explanation, that those wires communicated with the Tavy and brought the light into the lodging-house from its waters. If the river at Tavistock, which is wide and shallow, could give forth light of such excellent quality, what might not be expected from the rushing torrent of Tavy Cleave? Peter perceived that every difficulty had been smoothed away.