John Fiske,
Civil Government in the United States Considered with Some Reference to Its Origins
“ This method of vetoing a bill just before the expiration of a Congress, by keeping it in one's pocket, so to speak, was dubbed a "pocket veto," and was first employed by President Jackson in 1829. The president's veto power is a qualified form of that which formerly belonged to the English sovereign but has now, as already observed, become practically obsolete. As a means of guarding the country against unwise legislation, it has proved to be one of the most valuable features of our Federal Constitution. In bad hands it cannot do much harm, it can only delay for a short time a needed law. ”
