Second Sight Explained: A Complete Exposition of Clairvoyance or Second Sight, As Explained by the Late Robert Houdin and Robert Heller, Showing How the Supposed Phenomena May Be Produced / by Washington Irving Bishop, 1880, PGEN 134/6114. General Collection, GEN. University of Notre Dame Archives. https://archivesspace.library.nd.edu/repositories/2/archival_objects/1097782 Accessed November 29, 2024.