H. Rider Haggard 
Queen Sheba’s Ring 

Sir Henry Rider Haggard was an English writer of adventure novels set in exotic locations, predominantly Africa, and the creator of the Lost World literary genre. His stories, situated at the lighter end of the scale of Victorian literature, continue to be popular and influential. He was also involved in agricultural reform and improvement in the British Empire. "Queen Sheba’s Ring" is a 1910 adventure novel by H. Rider Haggard set in central Africa. It resembles the author’s earlier works King Solomon’s Mines and She, featuring plotting priests, beautiful women, and daring British adventurers. (Excerpt from Wikipedia)