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For those interested in historical things of a similar nature: https://en.m.wikipedia.org/wiki/London_Post_Office_Railway https://en.m.wikipedia.org/wiki/Londo
by tdeck 3y ago
For those interested in historical things of a similar nature:
https://en.m.wikipedia.org/wiki/London_Post_Office_Railway https://en.m.wikipedia.org/wiki/London_Post_Office_Railway
https://en.m.wikipedia.org/wiki/Paris_pneumatic_post https://en.m.wikipedia.org/wiki/Paris_pneumatic_post