Read it through once

The pilot car's flight down the mountain suggested the swoop of a swallow that is skimming the ground, so swiftly and smoothly and gracefully it swept down the long straight reaches and soared in and out of the bends and around the corners. We raced after it, and seemed to flash by the capes and crags with the speed of light; and now and then we almost overtook it—and had hopes; but it was only playing with us; when we got near, it released its brake, made a spring around a corner, and the next time it spun into view, a few seconds later, it looked as small as a wheelbarrow, it was so far away. We played with the train in the same way. We often got out to gather flowers or sit on a precipice and look at the scenery, then presently we would hear a dull and growing roar, and the long coils of the train would come into sight behind and above us; but we did not need to start till the locomotive was close down upon us —then we soon left it far behind. It had to stop at every station, therefore it was not an embarrassment to us. Our brake was a good piece of machinery; it could bring the car to a standstill on a slope as steep as a house-roof.