"Don't you? Symptomatic, though, doctor. They have been troubling me all the time, subconsciously. Now I know why. They ran from the kitchen."
"Well?"
"Well! And now the window-cleaner——"
"What about him?"
"Could you swear that it wasn't the window-cleaner who made those marks on the sill?"
"And the man Brotherton saw——?"
"Have we examined your laboratory roof for his footsteps?"
"But the weapon? Wimsey, this is madness! Someone took the weapon."
"I know. But did you think the edge of the wound was clean enough to have been made by a smooth stiletto? It looked ragged to me."
"Wimsey, what are you driving at?"