Which door did Booth enter?

[RJNorton]

Did Booth enter the State Box through the door to Box 7 or Box 8? Mike Kauffman points out in his new book that Booth entered through the open door to Box 8, which means he did not open the closed door in back of Lincoln in Box 7. I believe the door to Box 7 had the peephole.

Mike Kauffman writes, "Most authors have assumed that Booth entered through the door to Box 7, which was just behind the president's chair. But from this spot escape would have been impossible. This was a very narrow space with just enough room for the president's rocker and nothing else. Standing here, Booth would have found his path blocked by the wounded president. On the other hand, the Box 8 door was left open, and all the assassin had to do was take a step inside and look to his left for a clear shot as his victim."

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