Coventina Celata is an Imperial assassin located in the Felsaad Coast region nearby Graring's House. She was ordered by Carnius Magius to go there and assassinate Graring for the Ancient Nordic Pick Axe.
Falco Galenus has informed the Nerevarine of a strange block of ice found in a burial cavern discovered in the mine. He's requested to go speak with Graring, one of the local Nords about it. He and his companions can be found at the junction of the Harstrad River and Isild Rivers to the northeast of here.