Two copies of a six page document about the Vickers patent mooring gear for rigid airships, a sectional drawing of the aerodome and mooring tower for rigid airships and a drawing of the mooring mast for non-rigid airships:

- One copy dated 19 June 1919 which also contains three pages of notes in connection with the experiments carried out with the patent landing and mooring gear for rigid airships which Barnes Wallis has inserted into the file

- One copy dated 16 July 1919

Both copies are housed in their original files