The Citadel

The Archive of 'A Song of Ice and Fire' Lore

So Spake Martin

Egg and Aerion

This answer contains a SPOILER for those who have not yet read the story, so beware.

Egg did not want to reveal himself, and he most =especially= did not want to reveal himself to his brother Aerion, whom he hated and feared. He only did it in the end out of desperation.