[Drop title] Memoire sur les Sondages Exécutés dans le Sahara (Compagne 1857 - 1858) [Inscribed and Signed to Jean Baptiste Julien d'Omalius d'Halloy]
[Paris? E. Noblet, n.d., but 1858?]. First Edition. Octavo (25cm.); original plain blue side-stitched wrappers; 32pp.; folding engraved plan. Wrapper extremities chipped with some loss to spine, else Very Good, contents and plate fine. Inscribed and signed by the author to the Belgian geologist d'Omalius d'Halloy on half title, with..... More