How do I know this?
Look at the chart, Chief--this one which shows the court and the persons in it at the precise minute of first alarm.

You see how near the exit Mr.Roberts was, and who was closest to him.

I had a little talk--the most guarded one imaginable--with this lady, who was the very one of whom I have just said that she had omitted to put on her gloves; and she gave me the fact I have just passed on to you.

She noted Mr.Roberts' hands, because they shamed hers, and she was just stopping to pull her gloves from her coat-pocket when Correy's voice rang out and everything else was forgotten.
"Corroborative, only corroborative, sir?
I am quite aware of that.

But what I have now to add may give it weight.