McCann explained this to Shanley as he walked him around, up the track to the men's shanties, over the work, and back again down the track to inspect the interior of the dwelling they were to share in common—a relic of deceased Extra Number Eighty-three in the shape of a truckless box-car with dinted and bulging sides—dinted one side and bulged the other, that is.
"But," said Shanley, "I dunno what a switchback is."
"Who expected it av ye?" inquired McCann.
"An' fwhat difference does ut make? Carleton sint word ye were green. Ye've no need to know. So's ye can do as yez are told an' make them geesers do as they are told, an' can play forty-foive at night—that's the point, the main point wid me, an' it's me yez av to get along wid—'twill be all right. Since Meegan, him that was helpin' me, tuk sick a week back, I've been alone. Begad, playin' solytare is"
"I can play forty-five," said Shanley.
McCann's face brightened.
"The powers be praised!" he exclaimed. "I'll enlighten ye, then, on the matter av switchbacks, me son, so as ye'll have an intilligent conception av the work. A switchback is a bit av a spur track that sticks out loike the quills av a porkypine at intervuls on a bad grade such as the wan forninst ye. 'Tis run off the main line, d'ye mind, an' up contrariwise to the dip av the grade. Whin a train comin' down gets beyond control an' so expresses herself by means av her whistle, she's switched off an' given a chance to run
