"I have now... part of the proofs of your work on the Theorie de la Ricliesse Sociale, which you have been so good as to send me... I cannot delay expressing the pleasure with which I find that we have by independent paths reached conclusions which are nearly if not quite the same. I flatter myself with the hope that... we have both reached the truth, which must be one. ...[A]fter seeing a full statement of your mode of arriving at the equations of exchange, I cannot for a moment entertain the least doubt of the entire independence of your own researches... As to the question of priority of publication, it is... of less importance than that of the truth of the theory... I have always... attached much importance to this mathematical theory of economy, believing it to be the only basis upon which an ultimate reform of the science... can be founded and a solution of many difficult problems effected. I cannot, therefore, help accepting your very kind offer to make known in the Journal des Economistes... that I had already gone over part of the same ground... in a different manner. ...I feel it to be most honourable in you, after seeing merely the brief sketch of my theory as printed in the Statistical Journal for 1866, to acknowledge at once my priority on some points; and I shall be glad to learn your opinion of the much fuller statement of my views contained in the Theory of Political Economy, of which I have lately posted you a copy. ...I shall have much pleasure in doing what I can to make known in England your own excellent statement of the theory of exchange ...I trust that the theory ...will thus become the origin ...between us of many friendly letters."