He has to choose among his several sets, which he doesn’t manage to hide from the guards. But the guards do not seem alarmed or even curious about this, which sets them distinctly apart from most whom Waterhouse has dealt with. Naturally, these men are not on the Ultra Mega list, and so it would be a grave breach of security to tell them that he was here on Ultra Mega business. They appear to have greeted many other men who can’t state their real business, however, and don’t bat an eyelash when Lawrence pretends to be one of the naval intelligence liaisons in Hut 4 or Hut 8.