Mouse Alley
This very short, curving run links Blacklock Alley to Brian's Street, just west of Fishwife Alley It is named for a famous mouse that ran along it in front of the wizard Ahghairon and turned out to be, as he suspected, a shapeshifted sorceress of great power-the goddess Mystra, in fact! It is today the haunt of one of Waterdeep's best-if that's the proper term-informants and eavesdroppers: Ruufdeidel Roove Ressatar, a short, imp-like little man who is perpetually smiling and has a talent for hiding, moving silently and passing unnoticed. He can usually be found here lounging against a wall awaiting hire.
The alley is said to be sacred to Mystra. Here She aids those faithful to Her and punishes any who would harm Her faithful taking refuge here.
Of old, the wizard Thunturn whose hair was white with age, came here in his pride and power to challenge Mystra for mastery of all magic-and She sent him away humble, stripped of all Art, his hair turned jet black from the fright of confronting Her.