The Michael Douglas character in that movie was a Hollywood invention. And Patterson didn't kill either lion with a Howdah. But in many respects, not a bad attempt. Robert Stack--an actor who knew his way around guns--starred in a 50's version of the story of the Tsavo maneaters called "Bwana Devils". Early 3D movie.
Wife and I saw "The Ghost and the Darkness" together. She nudged me in one scene where a lion is carrying off a victim and whispered "A lion can't do that!" Pointed out to her that a leopard, which is a bunch smaller, can do that--as reported by Corbett in some of his maneater hunting stories. Reinforced later on when she saw our mouse catcher in chief trotting across the yard with a full-grown rabbit in his mouth, weighed about as much as he did.