The Wealth of Nations by Part 1 Chapter 10 Page 102

sciences, are at least equal to what is necessary for the greatest practitioners in law and physic. But the usual reward of the eminent teacher bears no proportion to that of the lawyer or physician; because the trade of the one is crowded with indigent people who have been brought up to it at the public expense; whereas those of the other two are encumbered with very few who have not been educated at their own.

The usual recompense, however, of public and private teachers, small as it may appear, would undoubtedly be less than it is, if the competition of those yet more indigent men of letters who write for bread was not taken out of the market. Before the invention of the art of printing, a scholar and a beggar seem to have been terms very nearly synonymous. The different governors of the universities before that time