The Seven Secrets by William le Queux

The consulting-room in Harley Street, where Sir Bernard Eyton saw his patients and gathered in his guineas for his ill-scribbled prescriptions, differed little from a hundred others in the same severe and depressing thoroughfare.

It was a very sombre apartment. The walls were painted dark green and hung with two or three old portraits in oils; the furniture was of a style long past, heavy and covered in brown morocco, and the big writing-table, behind which the great doctor would sit blinking at his patient through the circular gold-rimmed glasses, that gave him a somewhat Teutonic appearance, was noted for its prim neatness and orderly array. On the one side was an adjustable couch; on the other a bookcase with glass doors containing a number of instruments which were, however, not visible because of curtains of green silk behind the glass.