This biography of the German medical doctor and minerologist Diederich Wessel Linden (fl.1745-1768; d.1769) is the unabridged, pre-publication version of an accepted and revised article for publication in the Dictionary of Welsh Biography. This version is also available as an online blog post: https://bydbach.hcommons-staging.org/diederich-wessel-linden-fl-1745-1768-d-1769-medical-doctor-and-minerologist/