xAlison Chapman (ed.) and the DVPP team, “Heidelberg, August, 1867. (In Memoriam),” Digital Victorian Periodical Poetry Project, Edition 0.98.11beta
, University of Victoria, 7th May 2025, https://dvpp.uvic.ca/onceaweek/1867/pom_13545_heidelberg_august_1867_in.html.