In an email, Dale suggests that the three letters might refer to APL — the Aglaura Public Library: Wow, that's really strange about the letters from my description of my dream about the animals. I certainly hadn't noticed that, and it definitely seems too specific to be coincidental or anything. I've been thinking about possible interpretations of that phrase - three letters saved - since I first read your email, and the best I've been able to come up with is that it's a subconscious message about saving the Library, which we sometimes call the APL around here. The APL, three letters, understand? But the past tense has me confused, so I'm not sure if that's the correct interpretation anyway.