In the prologue of this book (on Page 12 of the paperbook edition), which is the year 1947, Dr. Israel Katz is flying to Athens. The text says "... he began to feel the familiar pain in a right leg that was no longer there, a leg amputated six years earlier by a giant with an ax." About a third of the way through the book, when they are back in 1941 (Page 167), Noelle, the lead character, goes to see Katz who has been injured. She looks down at him on the cot and sees a large torniquet around his LEFT knee, and the sheets are soaked in blood. Noelle asks Katz if he can travel with that leg, and he says, "I'm not going to travel with this leg." Just then a large man enters, carrying an ax. He walks to the bed and pulls back the sheet, so obviously it was Katz's LEFT leg tha was amputated, rather than the right as it says in the prologue.