delivered the opinion of tbe Court.
Bullock bad a small improvement on a piece of land, Ms bands had been seen at work upon it a short time before he sold his claim to Sherrer; for which he took a note of one thousand dollars, on which this suit is brought.
Sherrer, afterwards, located the land with a land warrant, first sending to the land officer at Helena a relinquishment from Bullock of his improvement to Sherrer, and receiving from the officer a reply that he would be permitted to cover the land with a warrant.
To the action Sherrer pleaded that the note was without consideration; and for reversal of the judgment rendered against him in the Circuit Court, it is contended that Bullock had no right of pre-emption to the land, no right to the land; that the amount of the note was so disproportionate to the value of the *730improvement that the improvement could not bave been the consideration of the note, and that, therefore, the plea was sustained.
"Whatever the claim of Bullock was, whether valuable or worthless, a right to a pre-emption, or an improvement, Sherrer recognized it, and saw fit to buy it; and, by means of Bullock yielding his claim, procured the government title. "Whether Sherrer made a good bargain, as he told the witnesses, or whether he agreed to pay one thousand dollars for an improvement worth not more than twenty dollars, are matters with which the courts have no .concern; but he cannot make use of the fact that Bullock had no claim to the land to obtain the title to himself, and then avoid his promised-payment for the claim, whose relinquishment enabled him to make a location of the land, which would not otherwise have been allowed. This would be in direct contrariety to the ' principle of Thredgill vs. Pintard, 12 How. 24; and, without any precedent, the law of this case would have been so declared by an affirmance of the judgment; which we now direct to be certified to the Circuit Court.