From: (redacted)
Subject: a theory

I started looking at your site yesterday, and I must say that I have
been completely captivated by this mystery. I have an idea that I
wanted to run by you.

I think, in the beginning, this was about postage stamps. The first
message is so reminiscent of some Chinese stamps.

Notice the date!

The second message, with the cuneiform on it about fish, might be
referencing these stamps.

The messages which reference Hannibal and Khartoum could be about "the
desert postman" stamp.

However, after that, it seems to change to describing a meeting place
for something (stamp collectors?).

Just wanted to pass this on to you.

Thank you for your site.