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My discovery of postal history continues with a single mourning mail cover from Glasgow. My limited library resources have nothing on mourning mail, so any insight will be greatly appreciated.
The attached cover was posted in Glasgow to the Queens Park part of Glasgow, where it was marked "Not Found", and four days later was given a CDS from Glasgow Southern D.D. I don't know whether the "Not Found" refers to the address or the addressee... I'm not trying to be funny (but I certainly see the irony), but since there was no return address, and the letter presumably ended up in a local sorting office, was this a "Dead letter"?
And I've been unable to trace Southern D.D. I guess the second D is for District, but...
Finally, is the knowledge that will enable an answer to these questions derived and accumulated from long experience, or is/are there any literature that will at least guide me along the way?
Warmest thanks and best wishes to whoever can help with some input!
Cheers,
Robin