This version of the H. Rider Haggard tale feels like classic boy’s-own fiction. Initially, Sir Cedric Hardwicke’s portrayal of Allan Quartermain seems a bit awkward, but he settles into the role quickly. He joins John Loder and Anna Lee on a quest to locate her father, who ventured deep into Africa in pursuit of King Solomon's fabled treasure. During their journey, they meet Umbopa (Paul Robeson), an exile, who assis…