| Level | Piece |
| Ref No | PSI/1/2/19 |
| Title | The Silent Three: The Cache |
| Date | 10 July 1978 |
| Extent | 1 cartoon |
| Creator Name | Simmonds; Posy (1945-); illustrator and cartoonist |
| Access Status | Open |
| Format | Drawing |
| Copyright | Posy Simmonds |
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