"Good!" assented Ralph. "If they are bound to have me invalided, at least let me learn something in the meantime."
Limpy did not talk much, but after an hour of his company Ralph voted him a wonder.
There must be some vivid history back of the man, Ralph theorized, for there were sparkles of real genuius here and there in his movements and explanations of the next two hours.
He showed Ralph the true merits and economics of the wiper's avocation in a quick, practical way that proved Ike Slump was a novice and a bungler.
Then the helper took Ralph under his special tuition higher up in the scale.
Ralph was in a real transport of delighted interest as the lame helper taught him the first principles of preparing, running and controlling a locomotive.
He did something more than control a throttle or move a lever—he explained why this and that was done, and demonstrated cause and effect in a clear-cut way that gave Ralph more real, sound information in two hours than he could have gained from the study of books in as many months.
The foreman passed in and out of the place several times during the afternoon, but seemed
