Waterhouse opens up his attache case, splotched and streaked with salt from his voyages to and from Qwghlm, and draws out two manila envelopes. "These are the copies I made before I sent the originals down to Bletchley Park," he says, patting one of them. "They are much more legible than the originals—" he pats the other envelope "—which they were kind enough to lend me this morning, so that I could study them again."