Crown Deep Ltd. Insurance Plan', carbon printed on cloth, giving a detailed layout of the gold mine, keyed to seventy-seven entries. With Manuscript table of results of 'Crown Deep tube milling tests, 1907'.

The two items rolled into tubes. The 'Crown Deep Ltd. Insurance Plan' carbon printed on one side of a piece of cloth roughly 44 x 102 cm. In good condition: slightly discoloured and frayed. The keyed entries range from '1 No. 1 Headgear & all appurtenances' to '77 Shed near Feedwater tanks', and include '69 Coolie Compound at Dam' and '57 Stable Boy's House'. The table of results of the 'milling tests', approximately 37 x 74 cm, is clear and complete on discoloured paper with closed tears at head repaired with archival tape. It consists of eleven columns consisting of entries of figures for 1 August to 9 October 1907, mesh, battery, water to sand, pulp entering tube-mills, reef fed, and four sub-headings for 'pulp leaving tubes': 'Krupp I 30 R.P.M.; 'Davidsen II 28 R.P.M.'; 'Robeson 30 R.P.M. III' and 'Auto I. sample'. The final column contains a few brief observations. According to one authority 'South Africa's deep-level gold mines in the era following the Anglo-Boer War of 1899–1902 [provided] a powerful example of just how lethal the new benchmarks of human effort could be. When by 1904 close to 50,000 Africans refused to return to the mines, mining policy began to coalesce around solving the “labor shortage” problem and dramatically reducing working costs. Engineers, especially American engineers, rapidly gained the confidence of the companies that had made large investments in the deep-level mines of the Far East Rand by bringing more than 60,000 indentured Chinese workers to the mines to make up for the postwar shortfall in unskilled labor in late 1904. But the dangerous working conditions that drove African workers away from many of the deep-level mines persisted. Three years later, in 1907, their persistence provoked a bitter strike by white drill-men.' (John Higginson, paper entitled 'Privileging the Machines').