Summary

Rufus Wheeler Peckham Ellis Roberts v. United States ex rel…

Unless the writ of mandamus is to become practically valueless, and is to be refused even where a public officer is commanded to do a particular act by virtue of a particular statute, this writ should be granted. Every statute to some extent requires construction by the public officer whose duties may be defined therein. Such officer must read the law, and he must therefore, in a certain sense, construe it, in order to form a judgment from its language what duty he is directed by the statute to perform.
Source: Wikisource

Rufus Wheeler Peckham Ellis Roberts v. United States ex rel…

The law relating to mandamus against a public officer is well settled in the abstract, the only doubt which arises being whether the facts regarding any particular case bring it within the law which permits the writ to issue where a mere ministerial duty is imposed upon an executive officer, which duty he is bound to perform without any further question. If he refuse under such circumstances, mandamus will lie to compel him to perform his duty.
Source: Wikisource

Rufus Wheeler Peckham Ellis Roberts v. United States ex rel…

There is but one act of Congress to be examined, and it is specially directed to the Treasurer. We think its construction is quite plain and unmistakable. It directs the Treasurer to pay the interest on the certificates which had been redeemed by him, and the only question for him to determine was whether these certificates had been redeemed within the meaning of that act. That they were, we have already attempted to show, and the duty of the Treasurer seems to us to be at once plain, imperative, and entirely ministerial, and he should have paid the interest as directed in the statute.
Source: Wikisource

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