<a rel="nofollow" class="external text" href="https://viaf.org/processed/DNB%7C1023793059">Marie‏ Heinzelmann</a> had a photo studio together with <a href="https://en.wikipedia.org/wiki/Charlotte_Jo%C3%ABl" class="extiw" title="w:Charlotte Joël">Charlotte Joël</a> in Charlottenburg. No known death date or birth date. Here she appears in a German address book from 1917. After 1939 she vanishes. She may have literally vanished considering her better known partner Charlotte was murdered in 1943 in Auschwitz II-Birkenau, but currently we don't know anything for sure. All the well known photos from the duo appear to have been made by Charlotte.
Unknown author<span style="display: none;">Unknown author</span> (published by Scherl)
<a rel="nofollow" class="external text" href="https://digital.zlb.de/viewer/readingmode/34115495_1917/1055/">Berliner Adreßbuch 1917</a>