I would like to thank Dr Markus Krause for the friendly consultation provided over many years, as well as Peter Raue, who always supported the Trökes family with consultation in legal matters. My thanks go to Tobias Heldt for his advice regarding photos and illustrations. I thank Dr Dorothea Schöne for the texts, as well as Janos Frecot and the archive of the Akademie der Künste [Academy of Arts], Berlin and the Staatliche Museen zu Berlin, Preussischer Kulturbesitz [Prussian Cultural Heritage Foundation]. I would also like to thank the BÜRO SCHOLZ for consultation, Sven Schönauer from recom ART with Florian Mozer, Dirk Daehmelow and Michael Haase for the scans and cagefish with Oliver Gresitza, Patrick Clicqué-Göbel and Philipp Weber-Bertram for their works. Manuel Trökes, Berlin, October 2018. And for careful translations on english pages I would like to thank Kenneth Friend. MT, February 2020. Last but not least I have to thank Mr. Dik Brunow and the staff of kulturgut|scanner (MIK-Center GmbH) for scanning the about 3,500 sketches out of 60 Sketchbooks for their fast and prudent work with the Art Books. M. Trökes, November 2020.

I would also like to thank the following auction houses, museums, galleries and institutions for the friendly cooperation and the provision of digital copies, as well as for their interest in the oeuvre of Heinz Trökes: