 Initially, it was thought that the project might take a year to complete. Unfortunately, after almost a decade of difficult work on the part of the two men, Cambridge University Press concluded that publishing Principia would result in an estimated loss of 600 pounds. Although the press agreed to assume half this amount and the Royal Society agreed to donate another 200 pounds, this still left a 100-pound deficit. Only by each contributing 50 pounds were the authors able to see their work through to publication. (Whitehead, Russell, &amp; James 1910)