Notebook: Artists
p71–p75“From / Lectures on Music with reference / to Dilettanti. by Hans George / Nageli. / Über die Hölle eine Brücke / zu bauen, um uns dem Himmel / wenigstens zu nähern.”
Fuller, Margaret. "Notebook: Artists." Houghton Library, Harvard University; bMS Am 1086 (94); Box 6.