By David J. Eicher
An autograph letter signed by John Flamsteed, Britain’s first Astronomer Royal, which demonstrates that his handwriting is different from annotations in Gingerich’s copy of the pirated edition of Flamsteed’s Historiae coelestis; Owen Gingerich Collection, Harvard University, Cambridge, Massachusetts, photographed September 20, 2013.
Related blog: A visit with Owen Gingerich, part 2