Jean-Martin CHARCOT (1825-1893). L.A.S., [ca. 1880?]; 2 pages in-8 with his cipher and address 17, Quai Malaquais. On nervous diseases. "I would be happy to be able to carry out the experiment you indicate. Unfortunately I don't have any actual madmen at my disposal, only nervous ones. But I'll suggest your idea to one of my colleagues at the hospice, in charge of the insane department, and I hope he'll want to take the matter in hand. At present, my studies are concerned only with the clinical side; in my opinion, the philosophical side cannot yet be tackled with any great chance of success. That's a job for the future. But that's no reason not to try"...