The consulting-rooms of Dr Orion Hood, the eminent criminologist and specialist in certain moral disorders, lay along the sea-front at Scarborough, in a series of very large and well-lighted french windows, which showed the North Sea like one endless outer wall of blue-green marble. In such a place the sea had something of the monotony of a blue-green dado: for the chambers themselves were ruled throughout by a terrible tidiness not unlike the terrible tidiness of the sea.