"I stop for him.

Son of a gun! If he bust my train I kill the sucker!" I never posed as much of a diplomatist, but it seemed wise to me in the circumstances not to offer any further information or ask questions.

But I was curious.

It was possible that Ali Higg's brother had been given the task of running that train for the reason that no lesser luminary would have one chance in a thousand of reaching the destination.
I never found out whether my guess was right or not, and never left off rating that engine-driver in any case as one of the world's heroes.

I've a notion there is a book that might be written about him and his train.
A polished black dot in the distance soon increased into the flattened egg-shaped rock, and then we saw Grim standing on the track with all his men.
That is the safest place to stop a train from, because you avoid a broadside from the car-windows.