Self Health: How to Obtain it and how to Retain it Peter Esslemont, 'Self Health: How to Obtain it and how to Retain it. A review of some of the world's famous health systems' (Kent: Edward Warde (Publishers) Ltd, 1950). The author of the book lived in Aberdeen; copies were sold locally by John E. Esslemont Ltd., 20 King Street, Aberdeen. 1950