The detective patted him on the back.
"Pull yourself together, man!" he said encouragingly.
"This man on the stairs," queried the Chief, "did you see him?"
"Ach was!" replied the prisoner, turning a tearstained face towards him, "I haf seen nothing, except old Mac's back vich vos right in vront of me, it vos so dark!"
"But couldn't you see the other person at all, not even the outline" persisted the Chief.
The prisoner made a gesture of despair.
"It vos so dark, I say! Nothing haf I seen! I haf heard only his step!"
"What sort of step I Pas it heavy or light or what? Did this person seem in a hurry?"