(There is a brazier-symbol, but it is not used)
Room 78 contains a brazier, not what appears to be a well. Not all statues and furniture were drawn in on the original map. The stairways in map 10 are really Room 17, not 19. Room 40 has windows that are not shown on the map. Two, there are a few very tiny mistakes or ommissions in the map. While this is not necessarily bad, it means that sometimes the structure of the castle and the positions of the rooms is not always apparent. One, the original map is three-dimensional. It has a good feel, a logical architecture, and plenty of details. The map of Castle Ravenloft, included in the original Ravenloft adventure, and later reprinted in 'House of Strahd', is one of the best maps of castles that I have ever seen (castle Avernus, in Roots of Evil, comes second).