“Twenty-four pulleys, one hundred counterweights / two lenses, dark shadows…”

Source: To Have and Have Not (1937), Ch. 24
Often misquoted or inaccurately paraphrased as "In every port in the world, at least two Estonians can be found."
Context: At pier four there is a 34-foot yawl-rigged yacht with two of the three hundred and twenty-four Esthonians who are sailing around in different parts of the world, in boats between 28 and 36 feet long and sending back articles to the Esthonian newspapers. These articles are very popular in Esthonia and bring their authors between a dollar and a dollar and thirty cents a column. They take the place occupied by the baseball or football news in American newspapers and are run under the heading of Sagas of Our Intrepid Voyagers. No well-run yacht basin in Southern waters is complete without at least two sun-burned, salt bleached-headed Esthonians who are waiting for a check from their last article. When it comes they will set sail to another yacht basin and write another saga. They are very happy too. Almost as happy as the people on the Alzira III. It's great to be an Intrepid Voyager.

Vitruvius, De Architectura, Book 1, Chap 6, Sec. 9; as translated in Morris Hicky Morgan (trans.), Vitruvius: The Ten Books on Architecture (1914), 27-28.
About

Source: De architectura (The Ten Books On Architecture) (~ 15BC), Book I, Chapter VI, Sec. 9

Source: Gregor and the Marks of Secret

Interview in the PBS documentary Triumph of the Nerds: The Rise of Accidental Empires (1996)
1990s

Source: The Wealth of Nations (1776), Book I, Chapter I, p. 8-9.
Context: To take an example, therefore, from a very trifling manufacture, but one in which the division of labour has been very often taken notice of, the trade of a pin-maker: a workman not educated to this business (which the division of labour has rendered a distinct trade, nor acquainted with the use of the machinery employed in it (to the invention of which the same division of labour has probably given occasion), could scarce, perhaps, with his utmost industry, make one pin in a day, and certainly could not make twenty. But in the way in which this business is now carried on, not only the whole work is a peculiar trade, but it is divided into a number of branches, of which the greater part are likewise peculiar trades. One man draws out the wire; another straights it; a third cuts it; a fourth points it; a fifth grinds it at the top for receiving the head; to make the head requires two or three distinct operations; to put it on is a peculiar business; to whiten the pins is another; it is even a trade by itself to put them into the paper; and the important business of making a pin is, in this manner, divided into about eighteen distinct operations, which, in some manufactories, are all performed by distinct hands, though in others the same man will sometimes perform two or three of them. I have seen a small manufactory of this kind, where ten men only were employed, and where some of them consequently performed two or three distinct operations. But though they were very poor, and therefore but indifferently accommodated with the necessary machinery, they could, when they exerted themselves, make among them about twelve pounds of pins in a day. There are in a pound upwards of four thousand pins of a middling size. Those ten persons, therefore, could make among them upwards of forty-eight thousand pins in a day. Each person, therefore, making a tenth part of forty-eight thousand pins, might be considered as making four thousand eight hundred pins in a day. But if they had all wrought separately and independently, and without any of them having been educated to this peculiar business, they certainly could not each of them have made twenty, perhaps not one pin in a day; that is, certainly, not the two hundred and fortieth, perhaps not the four thousand eight hundredth, part of what they are at present capable of performing, in consequence of a proper division and combination of their different operations.

Source: The Sound and the Fury

Source: Shadowfever