1. 2 MH. Armstrong Davison, The Evolution of Anaesthesia . Altrincham: Sherratt, 1965 : 101 , 117, for example.
2. 4 M. Elphick, 28 Castle Street, Oxford Street, Painter and Glazier . Pigot's Directory of London and Suburbs, 1839 : 141 .
3. 5 J. Robinson, The new means of rendering surgical operations painless . The Morning Chronicle and Advertiser, Tuesday, December 29th, 1846 : pp. 6 , col. 6.