Beginning, End, Middle
A good point to remember for future writing...I've done this several times and it works magically...figure out a potent quote for the beginning and end of a chapter and the rest will take care of itself. It's not just about establishing a natural point in time for the chapter to inhabit, it's about setting a tone, an emotional arc.
A beginning quote or scene-setting description or finisher should leave the reader with a distinct emotion that is also colored by either the end of the preceding chapter or the beginning of the next chapter.
That makes the decision of what to use for the end of the final chapter doubly important.
I think in a good biography, the foreword works on the reader as much as the beginning of the first chapter.