Question:  the Royal Society was unable to meet its promise to finance the publication of Newton's "Philosophiae Naturalis Principia Mathematica" and let this to the clerk of the society who was best known for computing what?
Sentence (from "De Historia piscium"): After Halley had personally financed the publication of "Principia", he was informed that the society could no longer afford to provide him the promised annual salary of £50.
Relevant evidence: No