[Marshall Hall, celebrated physician, neurologist and abolitionist.] Autograph Letter Signed, about the course of treatment of a patient.

2pp, 12mo. Bifolium. In good condition, lightly aged, with thin strip of paper from mount adhering at one edge. Folded twice. The recipient of the letter is the surgeon Henry William Robert Davey (1798-1870), son of surgeon Henry Sallows Davey (1781-1855) of Beccles. Reads: 'My dear Sir | I quite agree with you in your statement regarding our patient Mr. Cowan, & am [?] to support any alteration in your plan of treatment which appears to me to be most judicious'.