My dear doctor, M. d'Arcy and I will be at your house Friday morning around ten-thirty, if the weather permits. We were very disappointed that you did not keep your word yesterday. I saw a beautiful lady, Mme de Maillebois, who lamented your absence. You can be sure that the experiments on the igneous fluid will not take place without you. Adieu, my dear doctor, you know how much I am attached to you for life.