James Martin, The Detroit Institute of Arts has a Murillo (unless I'm mistaken). The Conservation Services Lab there may have done some analysis. Contact: Barbara Heller ([log in to unmask]) or call her at 313 833 7920. Suzanne Quigley [log in to unmask] >We are planning a scientific investigation of a painting, and are seeking >comparative data on works by the painter Murillo. The types of >comparative data we seek include x-radiographs, infrared >reflectograms/photographs, layering, and the composition of canvases, >grounds, paints and varnishes. >James Martin >Director of Analytical Services and Research >Associate Conservator of Paintings >Williamstown Art Conservation Center >Williamstown, MA 01267 >413-458-5741 (voice) >413-458-2314 (facsimile)