tall chimp who was made to appear gigantic with camera  trickery, and perspective shots. When Echo removes the ape from his  cage, the shot shows Echo (with his back turned to the camera)  unlocking the cage and walking the ape to the truck. The ape appears  to be roughly the same size as Echo. This effect was achieved by  having dwarf actor Harry Earles (qv) (who played "Tweedledee" in  the film) play Echo for these brief shots, and then cutting to the  normal sized Lon Chaney (qv), making it seems as though the Ape is  gigantic.