Dr. Ann Percy has, on the basis of a photograph, confirmed the attribution. The figure of the pointing man appears in a painting The Miracle of the Bitter Water turned to Sweet recorded in an engraving by Pietro Monaco published in Raccolta di centododici stampe, Venice, 1763, J. Byam Shaw and G. Knox, The Robert Lehman Collection VI, Italian Eighteen-Century Drawings, New York, 1987, p.186, fig.30