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Do pneumatic post networks strike anyone here as being built after electrical telegraphy had become established? These systems did depend on the use of the technology behind the electrical telegraph so that the sender can tell the receiver that something is on its way and the receiver can tell...

There used to be this site called stampworldhistory.com, while it focused on stamps, it featured maps of the areas of the stamps that were fairly detailed; especially the African colonies. I saved these maps and a few months later the site shut down. So naturally, having used these maps dozens...