The period 1920-1950 saw an explosion of books on coaching in the United Kingdom and the USA. F. A. M. Webster was by far the most prolific of the authors, producing book after book and a host of pamphlets and articles.
Alas, the environment within which Webster coached was far from matching that within which his American counterparts operated and his works therefore lacked the hard practical edge of those written by Dink Templeton and Dean Cromwell.
The other English athletics literature of this period came primarily from Oxbridge and was frequently composite works, written by athletes or ex-athletes. Here, events like triple jump, pole vault and hammer were often ignored, sometimes with the observation that they were unimportant. The plain fact was that few of the English writers knew very much about them.