Experiment 182, Exposition de Universelle de Paris, 12 August 1858 Exposition de Universelle de Paris
Earliest etchings without ground (before 1852). Steel photoglyphic plate - lace, 4" x 2 3/4", with proof. Lace 1852
Experiment 181, Palace of Duc de Montpensier, Clouzard & Soulier, 11 August 1858 Palace of Duc de Montpensier