Unsigned wood engraving, after an unnamed photograph, in Die Gartenlaube (Leipzig: Ernst Keil's Nachfolger), 1892, p. 288; scan via Wikimedia Commons (public domain). Cropped and downscaled. · Wood-engraved portrait captioned 'Der Naturforscher Dr. Fritz Müller in Blumenau', published with Peter Vogel's article about him in the Leipzig family magazine Die Gartenlaube, 1892, p. 288 (the article text, p. 291, says it carries his portrait on p. 288). Engraver and the underlying photograph are not named. The file is the illustration cropped from a Wikimedia Commons scan of the 1892 volume (916 x 1602 pixels) and downscaled to 686 x 1200 with no upscaling. · Public domain by age: an unsigned illustration first published in Leipzig in 1892 (before 1931 in the United States and well over 70 years from publication for an anonymous work elsewhere). No museum or library holds an item record for this scan: it is a volunteer's scan of his own bound volume uploaded to Wikimedia Commons, so the basis is age, not an institutional statement.