Updating an earlier conversation, I found an interesting reference in /Five Hundred Years After/ that seems to imply that height (or rather size) is indeed one of the indicators as to house identity. This comes from the first description of Grita, page 66, paperback: "Yet the roundness of her eyes gave the lie to this conclusion, and, furthermore, her complexion (which was nearly the color of an unripe olive) and her size spoke of the house of Tsalmoth." While it's a bit unclear if this indicates that Tsalmoth are especially large or especially small, it does indicate the one or the other is at least a factor for a Dragaeran who's trying to figure out what House another Dragaeran is a member of. Majikjon