The Terror
that the little Roberts boy had perished—whatever that awful way might be. Cradock had been asphyxiated; and here again there was no mark of a grip on the throat. It might have been a piece of work by Burke and Hare, the doctor reflected; a pitch plaster might have been clapped over the man's mouth and nostrils and held there.
Then a thought struck him; his brother-in-law had talked of a new kind of poison gas that was said to be used against the munition workers in the Midlands: was it possible that the deaths of the man and the boy were due to some such instrument? He applied his tests but could find no trace of any gas having been employed. Carbonic acid gas? A man could not be killed with that in the open air; to be fatal that required a confined space, such a position as the bottom of a huge vat or of a well.
He did not know how Cradock had been killed; he confessed it to himself. He had been suffocated; that was all he could say.
[143]
