Henry de Groux, The Ride of the Valkyries Chalk pastel on paper Signed lower right: Henry de Groux Framed under glass Created in around 1890. 75 x 115.5 cm Henry de Groux Former collection of HRH Prince Charles of Belgium. Henry de Groux (1866 - 1930), maître de la démesure, Musée Felicen Rops, Namur 2019, p. 77, no. 117.