Read it through once

"Then why did they stay there, after the deed was done? Mrs. Pratt had time, although she did not hear the cry for help, but woke up some moments later, to run to that room--and there she found these men standing and making no effort to escape. If they were guilty, they ought to have been running out of the house at the same time that she was running to that room. If they had had such a strong instinct toward self-preservation as to move them to kill that unarmed man, what had become of it now, when it should have been more alert than ever? Would any of us have remained there? Let us not slander our intelligence to that degree.