THE report of the meeting on February 15, 1946, of the Association of Special Libraries and Information Bureaux to discuss the “Indexing and Filing of Unpublished Material” (see Nature, 157, 259; 1946) has new been published. It includes the papers by Miss L. G. Thomerson on “Filing and Indexing Systems of Patra”, Mr. W. Ashworth on “Correspondence Filing Problems of the British Cast Iron Research Association”, Mr. A. E. Dodd on “The Filing of Unpublished Material in the British Refractories Research Association”, and by Miss D. Knight, “Unpublished Material in the Library of the National Institute for Research in Dairying”, which have not already appeared in the Journal of Documentation. The discussion includes contributions from Dr. F. Steggerda, director of the Nederlandsch Instituut voor Documentatie en Registratuur, and Dr. C. Groeneveld, of the Royal Dutch Shell Laboratory, and indicates the wide variety of practice. Two points which might be noted in passing are: first, the importance of relating the filing system to the quantity of material it is called upon to handle; and secondly, that notably in regard to correspondence, the papers and discussion collected in this report indicate a number of factors in efficient registry service which should be impressed firmly on all those using correspondence files, whether they bear any responsibility or not for the filing system itself.