Mentioned only by Wedgwood, who considers it to be synonymous with Serpent, and by Audsley, who says: Although no authority is furnished by an orchestral instrument, there seems to be no reason why a very valuable voice should not be given to the Concert- room Organ in the form of a Contra-Corno di Bassetto or Double Basset-Horn, 16 ft. We are strongly in favor of such a stop being introduced in every Concert-room Organ just as it has been in the Organ in the Centennial Hall, Sydney, N.S.W. [Australia]. A beautiful family might be created by the addition of an Octave Basset-Horn, 4 ft.