This mode is built around an evidence boundary: first you see what the medieval literary source actually says, then which rules OmenHall adds to turn that motif into an executable modern ritual.
E3 · literary attestation
What the source actually preserves
• Dallán makes four rods of yew.
• The source says Ogham is written on them; it does not specify the physical inscription technique.
• The phrase triana eochraib écsi ocus triana oghumm links the revelation of Étaín's whereabouts with his 'keys of écse' and Ogham; translations of écse vary across science, learning, knowledge, and poetic knowledge/art.