Box containing thirteen folders/books of letters and documents:

- one folder containing correspondence regarding AFD 31 - 61.
- one book for net and boom defenses.
- one folder containing a Yarrow advanced steam investigation for naval propulsion machinery.
- one ships book for the 'Scotsman'.
- one folder containing hydrostatic tables for HMS 'Vanguard'.
- one folder containing a technical report on a German auxiliary feed pump.
- one folder containing a technical report on a German boilder feed pump.
- one folder containing pumping/flooding arrangement details for 'Ranpura'.
- one folder containing a pencil drawing of 'Tahay'.
- one folder containing electrical arrangements for Italian submarines 'Alaga' and 'Zoea'.
- one folder containing electrical equipment test reports for 'Diligence'.
- one folder containing letters for Hermes class.
- one folder containing committee conversion reports for 'Gothic'.