Marsh Keep is a strong, stone tower with stockaded horse corrals. Should swift dispatch of messengers be necessary, horses are employed (pigeons tend to get eaten too easily by hawks here).
The keep contains some 40 militiamen. Regular patrols around the edges of the Mistmarsh are mounted from here, although the Marsh isn’t entered by these men. Although these are not technically located within the Cairn Hills, they are subsumed under the Commander of the Cairn Hills.