F.H. Butler (London), 5 April 1894; 12 May 1894; 23 June 1894; 25 March 1896; 25 March Date: 5 April 1894; 12 May 1894; 23 June 1894; 25 March 1896; 25 March
Foreign Office: Albert Gregory (London) re Australian minerals, 25 June 1904-27 June 1904 Date: 1904-06-25/1904-06-27
Foreign Office: Invoice from Dr F. Krantz (Bonn) for Australian minerals, 1904-06-21 Date: 1904-06-21
Foreign Office: Lists of Australian minerals, 17 July 1904; 27 July 1904 Date: 17 July 1904; 27 July 1904