found: His Prince Greenwood, 1874.
found: His Slovenly Peter, or, Cheerful stories and funny pictures for good little folks, 1919?:added t.p. (Dr. Henry Hoffman)
found: Der Struwwelpeter, 1992:t.p. (Dr. Heinr. Hoffmann)
found: Struwwelpeter 2000, c2000:t.p. (Heinrich Hoffmann) p. 3 (Heinrich Hoffmann, 1809-1894, b. in Frankfort am Main, lived there all his life)
found: Ho Petrotsoulouphēs, ē, euthymes histories kai asteies eikones, 2003:t.p. (Doktoros Herrikou Chophman)
found: Der Heulerspiegel, 1849:t.p. (Heulalius von Heulenburg)
found: Deutsches Pseudonymen-lexikon, 1906:p. 128 (Heulenburg, Heulalius von; pseudonym for Hoffmann, Heinrich)
found: Der Badeort Salzloch usw. usw., oder, Wie man ein Bad einrichtet, Gäste gewinnt under unterhält, 1993:t.p. (Dr. Polykarpus Gastfenger (that is: Dr. Heinrich Hoffmann, author of "Struwwelpeter"))
found: Hoffmann, Heinrich. Prince Greenwood and Pearl-of-Price, with their good donkey, kind and wise! , 1874:title page (translated from the German of H. Hoffman Donner)
found: Deutsche Nationalbibliothek, March 23, 2021(Hoffmann, Heinrich; life dates: 1809-1894; academic degree: Dr.; gender: male; place of birth and death: Frankfurt am Main; occupations: author; physician; psychiatrist; librettist; lists 16 variant names)
found: German Wikipedia, March 23, 2021(Heinrich Hoffmann (born 13 June 1809 in Frankfurt am Main; died 20 September 1894 Frankfurt am Main); German psychiatrist, poet and author of children's books; author of Struwwelpeter, which he illustrated himself and which brought him worldwide fame)