John Marshall,
Delassus v. United States — Opinion of the Court
“ Who can doubt that it would have been so perfected, 'in conformity to the laws, usages and customs of the Spanish government, had not the sovereignty of the country been transferred to the United States?'A grant or a concession made by that officer, who is by law authorized to make it, carries with it prima facie evidence that it is within his power. No excess of them, or departure from them, is to be presumed. He violates his duty by such excess, and is responsible for it. He who alleges that an officer entrusted with an important duty has violated his instructions, must show it. ”
