Box containing eight folders/books of letters and documents:

- one folder containing a report on the development of submarines 1917.
- one folder containing notes about aircraft production.
- one folder containing minutes re a cable laying vessel.
- one folder containing notes about USA shipping.
- one folder containing Air Ministry Technical Orders 1918 - 19.
- one folder containing a paper on British tanks.
- one folder containing V & W class torpedo boat destroyers.
- one booklet of secret technical information, 1918.