English physician (1815-1898) who became the personal doctor of Queen Victoria and discovered the distinction between typhus and typhoid. ALS signed “W. Jenner,” one page both sides, 4.5 x 7.25, 63 Brook Street letterhead, September 8, 1872. Handwritten letter to "Enfield," in full: “In future communications about the Dinner had better be official with Col. Sir Howard Elphinstone K.C.B. R.E. V. C. This will I think be more respectful to the Prince.” In fine condition. Encapsulated in a PSA/DNA authentication holder.