Little is known about the overall relationship between Himmler and Potthast . The couple most likely saw each other only rarely due to Himmler 's activity in his numerous offices . Presumably , neither Potthast nor Himmler 's wife were informed of his " secret work " . Potthast 's relationship with Himmler ended in early 1945 , — they met for the last time in mid-March 1945 , after which they shared daily telephone calls up until 19 April 1945
secret work
The Holocaust
Hedwig Potthast