"Of course you are aware--you know, I mean----" The Professor waved a powerful arm; beneath his shaggy brows his grey eyes sparkled angrily. "I know what I am doing," he said sharply, "and I cannot waste valuable time imparting to a layman knowledge gathered during a lifetime. The whisky, please--_at once_." I obeyed meekly. Five minutes later, the Professor was walking towards the bunk-house with a gallon demijohn tucked under his arm. A quarter of an hour afterwards he might have been seen returning. His eyes were positively snapping with vigour and excitement, for he loved a fight for a fight's sake. Ajax met him. "Professor," he said, "I don't want you to impart the knowledge of a lifetime to me, but do, please, tell us something. We are on edge with anxiety." The man of science melted. With a shrug of his massive shoulders, he said, mildly for him-- "My dear sir, I will try to gratify a not unreasonable curiosity. I did not wish to alarm you prematurely this morning, but the worst has happened. The silicious fragments in that confounded earth have lacerated terribly the mucous membranes of these three unfortunate young men. That in itself is a matter of small importance. The mucous membrane is most delicate, but it has quite amazing capacities of repairing itself. The point is this. The water in that spring, and-- I'll be perfectly frank--the water in most of the surface springs in this particular locality, is simply swarming with pathogenic germs, and amongst them I identified this morning the as yet unnamed _coccus_ which I had the honour to discover, and which is as deadly as the _coma bacillus_ of Asiatic cholera, or--shall I say?--the highly specialised venom of the rattlesnake." "Great Scot!" "This _coccus_, my dear friend, increases and multiplies under certain conditions. It exacts a highly lacerated condition of the mucous membrane into which it burrows. Fortunately it is rare; fortunately, also, it is seldom found in water which has filtered through diatomaceous earth; for these fossilised deposits are only found here and there, and, as a rule, not near water." "They are three good fellows." "I hope to pull them through," said the Professor stoutly. "For the moment there is nothing more to be done. They are in bed, and, not to put a fine point on it, half-drunk. Alcohol stupefies the _cocci_, but it does not destroy them. I shall pour whisky down their throats till the drugs I have ordered arrive from San Lorenzo. I have told your foreman that my patients are not to be disturbed. After supper I shall administer another dose of whisky." An hour later, the Professor, accompanied by me, returned to the bunk- house. "I hope to find them asleep," he said. "I gave them enough alcohol to induce stupor." "How much?" "At least a quart." I said with deference-- "I do not presume to question your treatment, but cowboys can carry an amazing quantity of whisky. Alcohol is a stimulant-narcotic, isn't it?" "Perfectly."