brought round the conversation to his special lines of research, he never seems to have failed to give his ideas quite freely, nay, as may be seen from the remark just quoted from Henry Mackenzie, not freely merely but abundantly--as many as would make a book. He does not appear to have been in this respect a grudging giver. I have already quoted his remark on hearing of Blair's borrowing some of his juridical ideas, "There's enough left." When Sir John Sinclair was writing his _History of the Revenue_ Smith offered him the use of everything, either printed or manuscript, in his possession bearing upon the subject. And if it is true that he was discussing his own book chapter by chapter with Franklin, Price, and others, about the very period when this remark to Sir Joshua purports to have been made, it appears most unlikely that he could have thought of setting any churlish watch on his lips in ordinary conversation. But however it be with his disposition to talk about his own pursuits, we know from Dugald Stewart that he was very fond of talking of subjects remote from them, and as Stewart says, he was never more entertaining than when he gave a loose rein to his speculation on subjects off his own line. "Nor do I think," says Stewart, "I shall be accused of going too far when I say that he was scarcely ever known to start a new topic himself, or to appear unprepared upon those topics that were introduced by others. Indeed, his conversation was never more amusing than when he gave a loose rein to his genius upon the very few branches of knowledge of which he only possessed the outlines."[238] One of his defects, according to both Stewart and Carlyle, was his poor penetration into personal character; but he was very fond of drawing the character of any person whose name came up in conversation, and Stewart says his judgments of this kind, though always decided and lively, were generally too systematic to be just, leaning ever, however, to charity's side, and erring by partiality rather than prejudice; while Carlyle completes the description by stating that when any one challenged or disputed his opinion of a character, he would retrace his steps with the greatest ease and nonchalance and contradict every word he had been saying. Carlyle's statement is confirmed by the remarks of certain of Smith's other friends who speak incidentally of the amusing inconsistencies in which he indulged in private conversation. He was fond of starting theories and supporting them, but it is not so easy to explain a man on a theory as to explain some abstract subject on a theory.