Lincoln and the theater, and theater in Lincoln's days

[L Verge]

I have no idea whether this can be authenticated, but there are two boxes below the higher boxes (7 & 8) that we are familiar with. Those lower boxes are definitely right on the stage, and Booth could have grabbed Lincoln easily from his spot on the stage. It seems strange that the presidential party would be seated in that lower box for The Marble Heart, but it is possible.