A similar entry appears in the Wheel of Time Companion confirming the information available in the main story arc.
Author: Atarah al'Norahn
He died fifteen years ago. After his death, Leane cried every night for a month, after tearing her sheets to shreds. For three more months, she could find tears in her eyes without warning, and it was a full year before she stopped hurting. Because of the pain, she never bonded another Warder, as she did not think she could live through the pain again.
(Reference: Lord of Chaos, Chapter 30)