People used to think we just faked all that stuff... it was all written, rehearsed. The fact that it looks as cobbled together as it does is just that we weren't very good.
Two things are desired in order that intercourse may be had: First, that a minister or agent be allowed to reside at the capital. Second, that commerce between different countries be freely allowed.
Jews have been in Egypt since Biblical times, and Alexandria had once been, at least partially, a Jewish city.

