Yesterday I visited the Wren Library, which houses many of Newton’s old books. Notably, they have a first edition of Principia Mathematica, with Newton’s handwritten corrections for the second edition. So what did Ike see fit to correct? Well, the title page of the first edition listed him as a Fellow of the Royal Society. Sir Isaac crossed that out: he was now the President of the Royal Society! As Jonathan Oppenheim pointed out to me, it’s weirdly reassuring to see a guy at the vertiginous top of the academic ladder, grasping in vain for the nonexistent rung above.