If you enjoyed Jim Corbertt's adventures in Northern India, then you will also enjoy Kennerth Anderson's adventures in Southern India.
Ditto about Anderson...Personally, I like Andersons books because I feel he belongs to this era, where as I find Corbett's writings have an almost "Victorian" style to them, although in actual time frame, the two gentlemen overlapped....Also, thats not to say I dislike Corbett's books..
With regards The Ghost and the Darkness, I'm pretty certain the film does contain the Railway car trap scene...
I'm pretty certain I have read other account of the Lions of Tsavo written by the chief engineer for the rail way project as a whole...Although he doesn't do a hatchet job as such on Patterson, the account still left me with the impression Patterson narrated the story from a very narrow and personal perspective.
Also in this second account, there was another character who turned up, who I think e was something like the Superindent of the Railway Police, but otherwise he sounded very much like the character Remington was based on..
If I can recall where I read it, I will post the information..
Edited to add, I think the other account I read was by R O Preston..The link
here mentions him in passing, but the account I originally read gave far more detail and lead me to speculate that the "Ghost and the Darkness" drew heavily on the incidents as described by Preston and used them to flesh out and support Patterson's account.