CALVERT, John (Madren Elbern Calvert, 1911 - 2013). Beyond the Sahara Signed Poster. Ca. 1956. Poster for “Beyond the Sahara”, commonly known as “Dark Venture”, the last of Calvert's films. SIGNED by Calvert along upper edge. Gilt frame, 28 1/2 x 20”. Very good overall; some scuffing to outer frame perimeter.