Letter, R. P. Rothwell to Edward Cooper (Containing extracts from letters and telegrams between Rothwell and Hall, the on-site engineer. Almost a day-by-day account of the problems encountered during the sinking of the initial mineshaft between November 1890 and August 1891.), 1891

Letter, R. P. Rothwell to Edward Cooper (Containing extracts from letters and telegrams between Rothwell and Hall, the on-site engineer. Almost a day-by-day account of the problems encountered during the sinking of the initial mineshaft between November 1890 and August 1891.), 1891, Box: 2, Folder: 8. Tiers-Frasch Collection, 00-31. Science History Institute Archives. https://sciencehistory.libraryhost.com/repositories/3/archival_objects/43326 Accessed November 24, 2024.