You who go in railways are necessarily shut up in long valleys and even sometimes by the wall of earth. Even those who bicycle or drive see these sig… - Hilaire Belloc

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You who go in railways are necessarily shut up in long valleys and even sometimes by the wall of earth. Even those who bicycle or drive see these sights but rarely and with consecution, since roads also avoid climbing save where they are forced to it, as over certain passes. It is only by following the straight line onwards that anyone can pass from ridge to ridge and have this full picture of the way he has been.