The Oarsman's Pride
A similar entry appears in the Wheel of Time Companion confirming the information available in the main story arc.
When Moghedien spots Nynaeve taking a boat on the river, she hurries into the inn and with a weave of Compulsion forces the stout innkeeper to take her to the roof then return to her room and forget she had seen her. Moghedien then uses her vantage point to try to kill Nynaeve with balefire.
(Reference: A Crown of Swords, Chapter 30)