"Upon the Property of The Mines Company of America (Creston - Colorada Company), Situated at Minas Prietas and La Colorada, Sonora, Mexico", Report., 1911, Box: 5, Folder: 156. Sydney Hobart Ball and Family Papers, MSN/MN 0513. University of Notre Dame Rare Books & Special Collections. https://archivesspace.library.nd.edu/repositories/3/archival_objects/863729 Accessed May 20, 2024.