I did not recieve your Letter of the 22d Feby 'till yesterday. I am much obliged by your Attention to my Request relative to the Enquiries on Plaister of Paris. I find that taking an Airing, or indeed a Gallop, now & then on some of my old Hobby Horses, relieves me from the small & sometimes the great Maladies of the Mind. If I can make these Excursions useful to others, a double Purpose will be answered. The Account given by Mr L. Lewis is exactly as I expected. Your Land is not of the Quality calculated for Plaister.

I interrupt your agreeable Law Engagements with a Bagatelle. Our agricultural Society have desired me to review my little Book on Plaister of Paris, for Republication; as it [is] out of Print. I wish to add all the modern Facts I can procure, but find everybody lazy & uncommunicative. I have been 2 Years endeavouring to collect Facts out of Loudon County Virginia (as there must be some Balm in Gilead) but have hitherto failed. It is only when the Maggot bites, or to relieve Ennui, that I get at such Subjects.