"There's only one thing that interests me. The tramp, all said and done, was free at night and able to feed on what he could pick up. But how about drinking?"
"Out of the question!" shouted the farmer. "Quite out of the question! There's no water except this; and we have kept watch beside it every night."
"It's a spring. Where does it rise?"
"Here, where we stand."
"Is there enough pressure to bring it into the pool of itself?"
"Yes."
"And where does the water go when it runs out of the pool?"
"Into this pipe here, which goes under ground and carries it to the house, for use in the kitchen. So there's no way of drinking, seeing that we were there and that the spring is twenty yards from the house."
"Hasn't it rained during the last four weeks?"
"Not once: I've told you that already."