(Envoi) EXPLORATEUR - Lieutenant KIEFFER(explorateur militai - Lot 456

(Envoi) EXPLORATEUR - Lieutenant KIEFFER(explorateur militaire) / "L'Exploration du Logone" - "Conférence faite par M. le Lieutenant Kieffer le 14 mars 1902", paperback, 27 p in-8 (16 x 25 cm), Imprimerie Léon à Alger 1902, polychrome illustrated cover and hors texte map (30.5 x 38 cm), one vignette photograph, this copy is enriched with a beautiful handwritten and signed letter to military explorer Octave Meynier: "A Meynier en souvenir denotre rencontre à Sada en janvier 1900,en souvenir d'une époque de misères de gloireet en témoignage d'affection", he has added a few notes on the first page of the text [The Logone, main tributary of the Chari, is a 950 km long African river which crosses Chad - It serves as a border in its last part between Chad and Cameroon - It was in 1900 that Lieutenant Kieffer made the ascent of the Logone from Fort Lamy to Laï].