Harry J. Lincoln, The Focus. Two Step, Williamsport, Pennsylvania: Vandersloot Music Pub. Co., 1908, Umschlag (aus: Heinz K. Henisch, Bridget Henisch, The Photographic Experience 1839–1914. Images and Attitudes, University Park/Pennsylvania: The Pennsylvania State University Press, 1994, S. 79)	Fenster schliessen