New Grub Street by George Gissing

After all, there came a day when Edwin Reardon found himself regularly at work once more, ticking off his stipulated quantum of manuscript each four-and-twenty hours. He wrote a very small hand; sixty written slips of the kind of paper he habitually used would represent -- thanks to the astonishing system which prevails in such matters: large type, wide spacing, frequency of blank pages -- a passable three-hundred-page volume. On an average he could write four such slips a day; so here we have fifteen days for the volume, and forty-five for the completed book.

Forty-five days; an eternity in the looking forward. Yet the calculation gave him a fainthearted encouragement. At that rate he might have his book sold by Christmas. It would certainly not bring him a hundred pounds; seventy-five perhaps. But even that small sum would enable him to pay the quarter's rent, and then give him a short time, if only two or three weeks, of mental rest. If such rest could not be obtained all was at an end with him. He must either find some new means of supporting himself and his family, or -- have done with life and its responsibilities altogether.