Stephenson had large wrought-iron boiler plates available and he also had the courage of his calculations... The idea found its best-known expression in the Menai railway bridge opened in 1850. Stephenson's beams, which weighed 1,500 tons each, were built beside the Straits and were floated into position between the towers on rafts across a swirling tide. They were raised rather over a hundred feet up the towers by successive lifts with primitive hydraulic jacks. All this was not done without both apprehension and adventure; they were giants on the earth in those days.
To exemplify, -a beautiful glossy nut, which, blessed with original strength, has outlived all the storms of autumn. Not a puncture, not a weak spot any where. -This nut... while so many of its brethren have fallen and been trodden under foot, is still in possession of all the happiness that a hazel-nut can be supposed capable of.
And so you know what I did with those sad things? I put them in boxes. I put the sad things in the boxes in my head, and I closed them up and I put tape on them and I stacked them up in the corner and threw a blanket over them."