The Voyage of Euclid's Elements, 400 - 1200 AD
- Yellow: Greek version, from Alexandria to Byzantium
- Yellow: Greek version, from Byzantium to:
- Baghdad, transl. to Arabic
- Palermo, transl. to Latin
- Pink: Arabic version, to Toledo via North Africa
- Cyan: Latin versions, to England, Rome
rev. 04 feb 2007 by ralph