"Oh, I will," the young cowboy promised, as he spurred on, followed by the engineer. They found Molick and several of his men making a sort of supplementary dam, the water having backed up more than they had calculated on, so that some of it was now flowing in the old bed of the stream over Mr. Carson's property. It was to prevent this that another dam was being made. "He wants to get every drop!" said Dave, bitterly. "Yes," assented the engineer. "He isn't satisfied with a fair share." Some of the workmen who knew Dave seemed a bit embarrassed as he caught them on the Carson land, for it was necessary for them to go there to complete the dam. The young cowboy, however, said nothing, preferring to leave it to Mr. Bellmore. The latter looked significantly at Molick, and remarked: "Seems to me you're overstepping a bit; aren't you?" "I don't know that I am," was the surly answer. "Why, you're on Bar U land--or some of your men are." "I know it." "What gives you the right?" "The law. It says I can go where I have to, to recover my property. I guess that's right enough." "Where is any of your property on Mr. Carson's land?" Molick pointed to the trickling water. "That's mine," he said. "It's escaping from my pond over the dam. I'm making the dam bigger, and if I have to go on Bar U land to do it, to save my property, the law gives me a right. I know what I'm talking about, for I've looked it up." As this was a point on which the engineer was not certain of the rights of Mr. Carson, he thought it better to say nothing. He observed, however, that there was more water than even he had calculated on, and that though the dam were raised it would overflow again, thus necessitating further trespassing on the Bar U property. "And if the flow keeps on increasing," the engineer reasoned, "it will give us a water supply in spite of all Molick can do. Guess I'll let matters take their course for a while." He said as much to Dave in a low voice, and the two rode away. They had seen all they needed to. "Dad can pasture here again soon," said the young cowboy. "Yes," assented the engineer, "I guess we don't need to worry much. There'll be more water than Molick can impound unless he raises a big concrete dam, and before he can do that we'll have legally established our own rights, I think." They resumed their way to the valley to measure the water there, and for some time were kept busy, Dave helping his friend make the calculations. "Well, there isn't as much as I thought there'd be," was the comment of the engineer, "but every little helps. We'll make a different section of this a year from now. If it wasn't for Molick standing out against the irrigation scheme we'd have the whole of Rolling River Valley in it." "Is there any way of forcing him?" asked Dave. "There may be, after he sees what he's missing."