Stern then spent several years trying to track down the 28 confiscated paintings. He created an advertisement in the German art magazine "Die Weltkunst", offering a reward for any information pertaining to the paintings' locations. Recovering the paintings proved to be extremely difficult. "Musical Party" by Dirck Hals and "Landscape with Figures" by Salomon van Ruysdael were eventually recovered with help from the Canadian government after the war had ended. "Last Judgment" by Hieronymus Bosch was returned in 1954. Other works were never found.