you know, how many times took a merchant boat from Alessandria of Egypt to Amalfi ?
have an answer, thanks to a letter wrote by a jewish merchant during the XI
century, discovered in Al-Cairo.
letter give us many information about the Amalphitain ship course from
Alessandria of Egypt, throught the Messina channel, to Amalfi.
that travel, instead of last 15 days, it lasted 75 days, because
there was a pirate squadron followed them and they frequently changed rigging.