Musical chairs in the State Box?

[RJNorton]

Kees, this does not answer your question, but IMO most drawings show Booth approaching Lincoln either from directly behind or from Lincoln's left side. But I believe most historians feel Booth actually entered the box from Door #8 which means he'd really be approaching Lincoln somewhat more at an angle and more from Lincoln's right side than commonly seen in the existing artwork. If Lincoln were looking down and perhaps somewhat to his left then the bullet could still have entered on the left side of the head despite the angle of Booth's approach.