De gran importancia resultaba sin duda el descubrimiento de la casa donde éste se había hospedado, hazaña imputable enteramente a la perspicacia y energía del señor Gregson, de la Scotland Yard.
A great step had been gained by the discovery of the address of the house at which he had boarded—a result which was entirely due to the acuteness and energy of Mr. Gregson of Scotland Yard.