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All references to Monte Cristo are either multifaceted or, conversely, don't suit anyone.
For example, the very decipherment – "Mount Christ" – requires a connection to religion. The word "religion" appears only in Plesen's profile, and even then, in a list.
The connection to treasures also led nowhere – I couldn't find anything in anyone's profiles that this could be meaningfully linked to.
There are no postage stamps with such an inscription...