Waldmann's touching eulogy to Julius Meier-Graefe demonstrated his appreciation for the historiography of art in genres other than his own. During his time as a student at Heidelberg, his colleagues included Rosa Schapire, Edwin Redslob, Walter Kaesbach, Ernst Kühnel.
Metzler Kunsthistoriker Lexikon: zweihundert Porträts deutschsprachiger Autoren aus vier Jahrhunderten. Stuttgart: Metzler, 1999, pp. 449-52; [Meier-Graefe comment] Kultermann, Udo. The History of Art History. New York: Abaris, 1993, p. 156