 I would like to thank the following people: Kai Wehmeier, whose careful eye as a logician and Frege scholar caught several passages where I had bent the truth past the breaking point; Emily Bender, who pointed out that I hadn’t observed the distinction between relative and subordinate clauses in discussing Frege’s analysis of belief reports; Paul Oppenheimer, for making some suggestions that improved the diction and clarity in a couple of sentences, and for a suggestion for improvement to Section 3.2; Wolfgang Kienzler, for suggesting several important improvements to the main text (he and Conden Chao both sent corrections and suggestions for the Chronological Catalog of Frege’s Work); Patricia Blanchette and Richard Zach for reading over, and providing constructive comments on, the reworked Section 2.7 (“Frege’s Conception of Logic”), which formed part of the update in late 2019; and Susanne Bobzien, for reading and commenting on the first draft of the new (as of 2022) Section 3.3.