| AltRefNo | Halsey-London Reconstruction p25a |
| Title | [Beginning of the close down for the Piccadilly underpass] |
| Description | Handwritten note from Halsey 'Hyde Park Corner during the building of the Piccadilly underpass'. Prints 25-40 re: Piccadilly Underpass at Hyde Park |
| Date | 23 Oct 1960 |
| Access Status | Open |