All the links in the article are dead, and not captured by the Archive, but I found a gallery of 3435 (!) of his drawings: https://deutschefotothek.de/ews/ete?

All the links in the article are dead, and not captured by the Archive, but I found a gallery of 3435 (!) of his drawings: https://deutschefotothek.de/ews/ete?action=queryGallery&index=personen_koerpers&desc=%22Janke,%20Karl%20Hans%22 https://deutschefotothek.de/ews/ete?action=queryGallery&inde...