Memo with Weak Speculation about Activities in Berlin (undated)
"[…] in Berlin, even in the political free and easy period of 1923 to 1929, the Einstein home was known as a Communist center and clearing house. Mrs. and Miss Einstein were always prominent at all extreme radical meetings and demonstrations. When the German police tried to bridge some of the extreme communist activities, the Einstein villa at Wannsee was found to be the hiding place of Moscow envoys, etc. The Berlin conservative press at the time featured this, but the authorities were hesitant to take any action, as the more radical press immediately accused these reporters of being Anti-Semites."