I want to know the answer to the following question:
Who paid to publish Principia Mathematica?
All the background I'm provided with is that "To add insult to injury, when it came time for publication, the three-volume work was so massive (more than 2,000 pages) and its audience so narrow (professional mathematicians) that it was initially published at a loss of 600 pounds, 300 of which was paid by Cambridge University Press, 200 by the Royal Society of London, and 50 apiece by Whitehead and Russell themselves.". Is that enough to answer the question?
Answer: yes