Female guards also staffed the Mauthausen subcamps at Hirtenberg, Lenzing (the main women's subcamp in Austria), and Sankt Lambrecht. The Chief Overseers at Mauthausen were firstly Margarete Freinberger, and then Jane Bernigau. Almost all the female Overseers who served in Mauthausen were recruited from Austrian cities and towns between September and November 1944. In early April 1945, at least 2,500 more female prisoners came from the female subcamps at Amstetten, St. Lambrecht, Hirtenberg, and the Flossenbürg subcamp at Freiberg. According to Daniel Patrick Brown, Hildegard Lächert also served at Mauthausen.