The Thematic Catalogue is a partial list compiled by Tranchell of his own early compositions, including titles, year (and part of year), a musical motif, and various other annotations. The Catalogue (also referred to as the 'Thematic Index') is held in the Cambridge University Library, MS.Tranchell.2.853.
A sample image
A note at the top of the first page states:
B Book. X not fully written.
'FL' is understood to mean Footlights.
IN PREP - the full catalogue will be published here soon. In the interim, we're publishing the list of missing songs, with their musical motifs, in the order they appeared in Tranchell's Catalogue:
Note that some of the musical motifs are not complete musical phrases, perhaps being more aides-memoire.