...as a result of my correspondence with the Art Institute of Chicago Museum Studies, came the request for a sample of the weaving of the canvas, to join the Assumption file of the painting. Lab O could not be more honoured !!! source: Zuccari, F., Véliz, Z., and Fiedler, I. (2005). Saint John in the Wilderness: Observations on Technique, Style, and Authorship. Art Institute of Chicago Museum Studies. 31:2, pp. 30-45+105-108, The Art Institute of Chicago. www.labo.pt