Quoting: Devilgr
This is just a fantasy that could do easilly a porn movie. In truth, the Sub-Saharan tribes in the 300 BC were nowhere nearby the Alexandria or the great Egypt area, but thousand miles away.
Of course my friends, at these times there were no airplanes, aircrafts, airbullcuckolds brownies... or whatsoever. Nice try...
Look at the map of the river Nile. It has two main branches: the Blue Nile begins in Rwanda in Central Africa and flows north through several countries before meeting up with the White Nile in Sudan. The White Nile begins in
Ethiopia and flows north into Sudan. From Sudan, the combined Nile flows north through Egypt before emptying into the Mediterranean.
This was the mode of travel that brought Ethiopians and other sub-Saharan blacks to the Mediterranean coast of Egypt. They then traveled west a short distance to Alexandria.
But you are right: it was indeed a very long journey for them.