At Edwin's opening of Hamlet in London's Prince Charles Theatre there is a lady in a red hat. She must have liked his performance, because she's in the audience for every subsequent performance.
When Edwin goes to meet John at their sister's request, the soldiers in the saloon and guarding John Brown's cell are wearing gray uniforms with blue trim. This is Hollywood's version of Confederate Infantry uniforms. However, Brown was executed on December 2, 1859, a full year before South Carolina seceded from the Union. The uniforms should have been Federal regular Army dark blue.