During the progress of the war the Government had been working some of the mines, and, at the time of the rapid advance of the British from Bloemfontein, instructions were given that all the gold should be conveyed to Pretoria. The week before the surrender of Johannesburg, Dr. Krause had given the necessary instructions for doing this, and had received a report that all gold had been transported. Now, it appears that Kock had taken advantage of the Commandant's absence from Johannesburg to further his scheme of destruction, and the first mine he went to with that purpose in view was the Robinson. On arriving there he accidentally discovered that about 120,000 ounces of gold, valued at about L400,000, were still stored on the mine. He was evidently so perturbed about this that he momentarily forgot his purpose, and galloped post-haste with the greater number of his men to the Commandant's office. His men were drawn up outside; he dismounted and found Dr. Krause in consultation with Commandant L.E. van Diggelen, the energetic officer in command of the Mines Police. Kock adopted a threatening and bullying attitude, and demanded the reason why so much gold had been left on the mine, and where the treachery lay. During the course of his angry outburst he disclosed the fact that he had proceeded to the mine for the purpose of destroying it, and had discovered the presence of the gold. It may be mentioned here that Dr. Krause, in the course of the morning, had been in telegraphic communication with General Botha, who was then in the vicinity of Eagles' Nest, and had informed him that it would probably be necessary to take violent measures against Kock, which might lead to bloodshed. General Botha's reply was: "I hold you responsible for the safety of the mines and the town of Johannesburg, and I leave everything in your hands."