Summary

Portrait of William R. Day William R. Day United States v. Crosley — Opinion of the Court

But, as we understand the Army Regulations, such officers may be at any time required to render mounted service, and are therefore given the pay of that class. Obviously, the duties of an aid to a rear admiral are not such as to require him to render mounted service, and, as the Navy personnel act only undertakes to afford a measure of compensation for duties which can properly be required of a naval officer, it can have no operation to provide pay for services peculiar to the Army.
Source: Wikisource

Get perspective with Kwize: daily news enlightened by great literature