“ And we would all try to do it in our heads, and all arrive at different results, and sneer at one another. ”
 Jerome K. Jerome, Three Men in a Boat (1889). copy citation

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“We would find the hammer for him, and then he would have lost sight of the mark he had made on the wall, where the nail was to go in, and each of us had to get up on the chair, beside him, and see if we could find it; and we would each discover it in a different place, and he would call us all fools, one after another, and tell us to get down. And he would take the rule, and re-measure, and find that he wanted half thirty-one and three-eighths inches from the corner, and would try to do it in his head, and go mad.
And we would all try to do it in our heads, and all arrive at different results, and sneer at one another. And in the general row, the original number would be forgotten, and Uncle Podger would have to measure it again.
He would use a bit of string this time, and at the critical moment, when the old fool was leaning over the chair at an angle of forty-five, and trying to reach a point three inches beyond what was possible for him to reach, the string would slip, and down he would slide on to the piano, a really fine musical effect being produced by the suddenness with which his head and body struck all the notes at the same time.” source

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