20 May 1932. Rectangular Rock-Cut Shaft (Vanderpool): 15 August 1932-15 October 1932, 9-24 December 1932. May, June 1933. 25 May 1934-31 May 1934. 23 February 1935-5 March 1935.
21 September 1932 20 September 1932 19 September 1932 17 September 1932 16 September 1932 16-19 September 1932 15 September 1932 10 September 1932 9 September 1932 September 1932 7-8 September 1932