Crippen (Hawley Harvey) Typed letter signed ('H.H. Crippen') on The Aural Remedies Company letterhead, reading in part "For many years past I have made Diseases of the Ear my particular study, and without wishing to appear egotistical, can lay claim to have achieved remarkable success in this branch of curative medicine. Long years of experience have enabled me to form a sure and correct diagnosis on the cases submitted to my notice. Through the aid of my Treatment, these cases have readily yielded to medication, and in an extraordinary large number of instances, have resulted in ultimate cure and permanent restoration of hearing [...] Ever since I have devoted myself to this branch of medical work, I have felt deep sympathy for the afflicted Deaf. Their inability to hear ordinary sounds, conversation, Music etc, seems to cast so terrible a gloom over their whole existence, and, what surely is even more pitiable, is to see the number of cases in which deafness could have been arrested if taken in time", two pages, mailing folds with some splitting, scattered foxing and  yellowing, small loss to left margin, tape residue, London, 2 December 1909; with an autograph letter written by mass murderer John G. Haigh to his lawyer, signed “J G Haigh”, 8 June, 1949 (2)