Metiers that the Glasgow professors had made him sit in the chair of Adam Smith. After an active life of teaching and writing, he died in Paris, 15th November, 1832.
Ricardo writes to him from Gatcomb Park on 18th Aug., 1815, thanking him for the copy of the (first edition of the) 'Catechisme de l'Economie Politique,' which he had just sent. Though complimenting him highly on the work, he thinks that Say has not, even yet, with sufficient clearness distinguished Value from Utility. No doubt to have value a commodity must be useful, but it is the difficulty of its production that is the sole measure of its value. 'The wealthiest man is he who has most values, and who is able, by giving them in exchange, to procure himself not the things which he himself and everybody else regard as the most desirable, and which can be had at a low price, but the things that are difficult to produce and consequently dear. A man is rich not by the moderation of his desires, but by the quantity of commodities that he possesses.' Say has also, in Ricardo's opinion, forgotten sometimes that the growth of the capital of a manufacturer cannot be safely estimated in money if we do not allow for the change in the value of money. Ricardo concludes: 'The pleasure which I take in reading and studying good works on political economy has not diminished since I saw you. I should devote all my time to the discussion of points which seem to me to need further elucidation, if I had any talent for composition. However, I have ventured to publish the pamphlet[111] which I sent you, and I should be glad to know your opinion on the doctrine which I maintain in it in relation to the rent of land and the rate of profits, in opposition to Mr. Malthus. I learn from Mr. Mill that several persons in this country do not understand me because I have not explained my views at sufficient length; and he is trying to induce me to undertake an explanation of them from the beginning and at greater length; but I fear that the undertaking is beyond my powers.' (Oeuvres Diverses de Say, pp. 409-11. Ricardo wrote in English, but in this and the other cases the editors give only the French.)