  What I'm trying to get across is that a ter'angreal can access information by interfacing with T'A'R OR it can access information by interfacing with the Mirror Worlds, but is unlikely to be able to interface with Both -- and generally won't need to access both because almost everything is interconnected by T'A'R anyway.  Oh...so we agree. T'A'R is capable of feeding such data to the Ter'angreal (which it obviously is doing in the case of the Ter'angreal Arches).  So what were we disagreeing about? Oh yes, the Columns Ter'angreal. It might be useful to get a question out there and see if they'll answer whether or not it was manufactured after they arrived in Rhuidean, or if like the others it was something that was brought to Rhuidean.  