'Scotland Yard,' I said.
After that for a minute there was utter silence. The old man was staring at his plate and fumbling with a nut, the very model of innocent bewilderment.
Then the plump one spoke up. He stammered a little,like a man picking his words.
'Don't get flustered, uncle,' he said. 'It is all a ridiculous mistake; but these things happen sometimes,and we can easily set it right. It won't be hard to prove our innocence. I can show that I was out of the country on the 23rd of May, and Bob was in a nursing home.You were in London, but you can explain what you were doing.'