|Series of volumes labelled A to W (described by Norris as the 'English letter series'), containing notes relating to spiritualism and mesmerism. The 'books' appear to be unpublished. Additional typed copies of the books or parts of the books and a 'Complemental' book to Book S are also included in this series. Books labelled X, Y and Z by Norris are not included in this sub-series because they do not relate to spiritualism.
Books A to J and M are described in US41/6/1/1 as 'written notes made at the time thought of during several years'; N and O as 'confined to hypnotism'; P as 'an analysis of Mrs Piper'; Q as 'a diagrammatic book of rapports'; R as 'on insanity'; S as 'prop: auto, allopsychic and peripheral'; T as 'life and consciousness'; U as 'religious mediumship'; V as 'series of early reflections'; W as 'materialization'; X, Y and Z as 'physiological (segments etc)'.
US41/6/1/2-3 contain brief summaries of the contents of these volumes, and US41/6/1/1 provides an index of most of these volumes.
See also US41/6/2 and US41/6/4/9 which includes lists of paragraphs contained in the 'English letter series' on particular topics. For book J see US41/6/6/1, and for books X to Z (which do not relate to spiritualism) see US41/5/1-3. See US41/6/9 for some of the original notes used in creating some of the 'English letter series' of books.