This series of photographs is from Physical Training for Business Men by American author Harrie Irving Hancock. The 1919 book’s premise is that a certain quality of physical presence, “impressive carriage and appearance”, are essential to “those who would succeed in the business world”. The photos were taken by a “Mr Phelan” (who worked with Hancock on a number of other exercise books); the models are unnamed. (Abridged from The Public Domain Review.)