 His pseudonym was given him by Max Friedländer, who reconstructed part of the anonymous painter's oeuvre, starting from two panels devoted to Saint Giles (a "Miracle" and a "Mass") in the National Gallery, London, that were part of the lefthand shutter of an altarpiece, and two further panels now in Washington from the same altarpiece.The hand of an assistant can be discerned in the "Baptism of Clovis" at the National Gallery of Art, Washington, who also have a panel with "Episodes from the Life of a Bishop-Saint" - perhaps Saint Leu, Saint Denis or Saint Remy.All four panels have, or had, single grisaille figures of saints (Saints Peter, Giles, Denis and an unidentified bishop-saint) in niches, imitating sculpture, on the reverse.