Ditmas was an influential official of the British Association of Special Libraries and Information Bureaux, whose journal she edited, and of its successor, Association for Information Management. As Association for Information Management general secretary in 1946, she called strongly at the Empire Scientific Conference for "a combination of government encouragement and private initiative" in developing specialized information services. This approach was to prevail. Ditmas turned in retirement to writing guidebooks.
Latterly she was resident for a long period at Benson, Oxfordshire, and completed a thorough history of it in 1918.
This circulated in typescript and was published posthumously in 2009, with addenda of information on subsequent archaeological research and of early maps. The one surviving picture of Ditmas was taken on a Women"s Institute outing, the Wisconsin being one of her abiding interests.
M. M. M. M.