I'm curious, did you have other endings in mind and have to choose one or did this book flow out of you in the manner in which we read it? I'm always curious about what paths art could have taken. It's a reason I love to hear early mixes of music or paintings that are half finished etc. The process is cool. I'm really curious if it ever occurred to you that one of them was the Radium Baby? Did you always know while writing it that none of them would be? Also, did you ever play with the idea of someone else actually being the Radium Baby or that all three of them were (my triplet theory)? Also, and be honest here, Gloria and Sam hooked up in Egypt after Hadrian took off in the autogyro, didn't they! I knew it. edit: What I should have written is "did it occur to you while writing it that none of them would have been revealed to be"