Below are Henry's notes and descriptions of sponges, scanned by Nathan Harris in 2020 Reiswig, Henry M.; Harris, Nathan A., 2020, "Notes, Illustrations and Annotations on Sponge Specimens", Scholars Portal Dataverse https://doi.org/10.5683/SP2/N5SWPE and Reiswig, Henry M.; Harris, Nathan A., 2020, "Systematics Compilations on Various Sponge Taxa", Scholars Portal Dataverse, https://doi.org/10.5683/SP2/XMA1JW
