1875. Siemens, Charles William (1823-83). Autograph letter signed to Latimer Clark. London, April 6, 1875. 1- pp. 203 x 125 mm. Remains of mounting present. Provenance: Latimer Clark. Siemens, one of the most successful inventors and entrepreneurs of the nineteenth century, was a younger brother of Ernst Werner Siemens, discoverer..... More