“ While departmental construction of the Clapp amendment does not have the weight which such constructions sometimes have in long-continued observance, nevertheless it is entitled to consideration,-the early administration of that amendment showing the interpretation placed upon it by competent men having to do with its enforcement. The conviction is very strong that if Congress intended to remove restrictions only from those who had half white blood or more, it would have inserted in the act the words necessary to make that intention clear ”

“ The government further insists that its interpretation of the act is consistent with its policy to make competency the test of the right to alienate, and that the legislation in question proceeds upon the theory that those of half or more white blood are more likely to be able to take care of themselves in making contracts and disposing of their lands than those of lesser admixture of such blood. ”

“ We cannot believe that such was the congressional intent, and we are clearly of opinion that the courts may not supply the words which Congress omitted. Nor can such course be induced by any consideration of public policy or the desire to promote justice, if such would be its effect, in dealing with dependent people. ”