However, Parma was not interested in new works and so approaches were made to Milan. Whether "Rocester" actually became the basis for "Oberto" when Verdi was able to return to Milan in February 1839 after fulfilling two and a half years of his contract in Busseto is subject to some disagreement amongst scholars. How much of "Rocester" remained visible in "Oberto" is discussed by Roger Parker, who does suggest that "in this shape-shifting tendency, the opera was, of course, very much of its time."