A recent addition to the collection is the book by David Potter on the history of the TR Railway Letter Service. On the 1st February 1891 most of the railway companies in Great Britain entered into an agreement with the Post Office whereby letters could be carried by the railways between any two railway stations throughout the country. The railway initially accepting the letter, irrespective of it being carried by other railway companies during its journey, collected the railway fee of 2d in 1891.
The Talyllyn Railway was included in the 1891 agreement but did not operate a regular railway letter service until May 23rd 1957, when the railway fee was 11d and the ordinary postage was 2½ d.