Which door did Booth enter?

[Craig Hipkins]

Interesting topic. This may be common knowledge, but does anyone know what hand Booth fired his Derringer with? Was Booth right-handed or left handed? Would this have made a difference as to where Booth was standing when he fired the shot in the back of Lincoln's head?
Reviewing Dr. Lattimer's version in his book he states that:(page 21) "Booth stepped quickly through the door in the end of the little anteroom, turned sharply to his left behind Mrs. Lincoln's chair, pointed his single-shot derringer pistol at the right side of President Lincoln's head, and pulled the trigger."

Turning sharply to the left would seem to indicate and support Mike Kauffman's belief that Booth entered through box #8. If Booth had entered through box #7 would he have not fired into the left side of the President's skull?

Craig