The book sold well. The first edition, of whose extent, however, we are ignorant, was exhausted in six months, and the sale was from the first better than the publishers expected, for on the 12th of April, when it had only been a month out, Strahan takes notice of a remark of David Hume that Smith's book required too much thought to be as popular as Gibbon's, and states, "What you say of Mr. Gibbon's and Dr. Smith's book is exactly just. The former is the most popular work; but the sale of the latter, though not near so rapid, has been more than I could have expected from a work that requires much thought and reflection (qualities that do not abound among modern readers) to peruse to any purpose."[244] The sale is the more remarkable because it was scarce to any degree helped on by reviews, favourable or otherwise. The book was not noticed at all, for example, in the _Gentleman's Magazine_, and it was allowed only two pages in the _Annual Register_, while in the same number Watson's _History of Philip_ got sixteen. This review of the book, however, was probably written by Burke. Smith speaks in one of his letters to Strahan of having distributed numerous presentation copies. One of the first of these was of course sent to his old friend David Hume, and that copy, by the way, with its inscription, probably still exists, having been possessed for a time by the late Mr. Babbage. Hume acknowledged receipt of it in the following letter, which shows among other things that not even Hume had seen the manuscript of the book before publication:-- EDINBURGH, _1st April 1776_.