""How James Chalmers Saved The Penny Postage Scheme"" is a historical book written by Patrick Chalmers, detailing the efforts of James Chalmers in saving the Penny Postage Scheme. The book is based on a letter written by the Dundee Bankers and Merchants to the Lords of Her Majesty's Treasury in 1890. The Penny Postage Scheme was a revolutionary postal system introduced in the United Kingdom in 1840, which allowed people to send letters at a flat rate...