sentences:  The voyage was marred on 17 November 1940 when "Mechanikergefreiter" Fritz Pfeifer was lost overboard.After sinking the British convoy straggler, the ore-carrier SS Cree (torpedoed and sunk with the loss of all hands on 21 November) the boat was seriously damaged on 3 November by a collision with an unknown object ("probably a convoy vessel").She returned to Lorient on 28 November.