Of course, the key was "officially." Every system has back doors. It was conceivable that Theresa had been admitted somewhere unofficially, or under another name. Neither of which I was equipped to explore at the moment. Much as it hurt to do so, I had to put the issue on the back burner. Lacking the least idea of how to proceed further in Theresa's direction, the best thing seemed to be getting on with something else and hoping for a flash of inspiration.