After Sam is given three or four hard punches to the same side of his face, he goes and cleans up in the back room. When he comes back to the bar, there are no bruises or swelling, just a drop of blood on his lip.
After Kitty returns to work, she is seen going over the prior days business, with Sam. Among the papers, she is also seen handling a modern day clipboard. The clipboard wasn't invented until approximately 1908 by George Henry Hohnsbeen.