Possible Clues:

• Based on the number 8
• Like some early computer number systems
• Eight-ish?
• Eight-based
• Written in base-8
• Having half the available digits of hex
• It's about 8, and the writer's absent from production of Camelot
• Relating to base eight
• Method of counting back only partially useful at court
• Month to go over nearly everything to do with numbering system