 Some of these accounts, published posthumously by "Die Musik" in 1902 and 1903, suggest that he was an equal collaborator with Liszt.Raff's assertions were supported by Joachim, who had been active in Weimar at approximately the same time as Raff.Walker writes that Joachim later recalled to Raff's widow "that he had seen Raff 'produce full orchestral scores from piano sketches.'"