A couple of things seem a little strange to me about Pharr's text (well, actually, there are a bunch of strange things, like why are there so many chapters where the exercises don't relate to the assigned bits of grammar and vice versa...)
Anyway, what's up with the "Optional:" section in every chapter? He says in a footnote "Sections to be assigned at the discretion of the instructor," but as far as I can tell he puts this in every single chapter as a numbered section but never, not in any of 77 chapters, does he ever actually put anything in there. The only exception is even more curious, where in Lesson VII the optional states "review all the optional sections studied thus far." [Wright does add a few optional in his revised version of Pharr, but these were written several decades later.]
Also, for sections 489-500 he has written "These sections, which are omitted from this book for the sake of brevity, refer to the standard Greek grammars."
What is he talking about? Omitted from where? I thought these were his sections in the first place. Do they exist somewhere else? Is there some larger version of this book, or is he basing his section numbers on some other, more established text?