In the 1850s, the scientist Richard Owen argued that a death mask discovered in Germany by Ludwig Becker in 1849, known as the Kesselstadt Death Mask, was probably used by Johnson to model the face of the effigy. The mask had been claimed to be of Shakespeare because of a similarity to an alleged Shakespeare portrait Becker had bought two years earlier. This was depicted by the painter Henry Wallis in his imaginary scene portraying Ben Jonson showing the death mask to the sculptor. However, measurements of the mask and the monument figure did not correspond, most notably the bony structure of the forehead, and the idea was discredited. Though the Kesselstadt mask does not seem to fit, Park Honan asserts that the facial features of the monument do appear to have been modelled on a mask: "His eyes stare, the face is heavy and the nose is small and sharp. Because of the shrinkage of the muscles and possibly of the nostrils, the upper lip is elongated".