Mystery surrounds the reasons why Otto was at Netley for so long. He was wounded and taken prisoner on the 6th September 1914 and taken to Netley as a prisoner of war. He died there on the 14th of December 1916. Documents from the National Archives dated January 13th 1917 are asking if he can be exchanged for Lt. Gore-Brown who was a prisoner of war in Germany. This came too late for Otto.