From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Hand-drawn diagram illustrating an aerial installation, labelled as Figure 4.
| Identifier | ExFiles\Box 168b\1\ img267 | |
| Date | 6th May 1938 guessed | |
| A Lead in B Aerial? C Fig. 4. | ||