“That’s been proved,” said Razumihin with apparent reluctance, frowning. “Koch recognised the jewel-case and gave the name of the owner, who proved conclusively that it was his.”

“That’s bad. Now another point. Did anyone see Nikolay at the time that Koch and Pestryakov were going upstairs at first, and is there no evidence about that?”

“Nobody did see him,” Razumihin answered with vexation. “That’s the worst of it. Even Koch and Pestryakov did not notice them on their way upstairs, though, indeed, their evidence could not have been worth much. They said they saw the flat was open, and that there must be work going on in it, but they took no special notice and could not remember whether there actually were men at work in it.”