The Copenhagen Connection - Elizabeth Peters Um, so why did the thing have to be called a bathrobe? Deathrobe would have been more appropriate. If it was supposed to be a code word, it was unnecessary, since everyone involved apparently knew what the reference was, except Elizabeth and Christian, and they were the ones who received the ransom note asking for the "bathrobe," so it would make sence that they would need to be told what it actually was. Hence their confusion.