The professor's papers were mostly arranged under correspondents although there were a number of subject files. This original order has been maintained as far as possible.
Professor Dingle frequently used the backs of old letters or circulars etc for carbon copies of his correspondence. It has not been possible to index the contents of such letters etc which were mostly of an ephemeral character. They indicate however the wide scope of his interests.
Extraneous matter such as the offprints of other authors has been removed and forms a separate unlisted bundle. There were a very large number of photographic copies of articles in 'The Listener', and 'Nature', and these have been destroyed. The original printed articles are in the collection of newscuttings.