This section contains files of notes and music manuscripts of work in progress as well as files containing numerous transcriptions of works collected for reference or for possible editing or arrangement. Most are in Imogen Holst's hand.
Imogen's music manuscripts for works by other composers which she had completed editing or arranging, or worked on in some detail, are included in section HOL/2/1.
The files mostly contain music manuscripts but there are also some files of notes, papers and correspondence. Many of these papers were arranged into envelopes and files by Imogen Holst and this foundational arrangement has been preserved.