The whole of our Chapter 12 was also a complete chapter in the original. That was appropriate because it was entirely Moroni’s writing, and unrelated to the specifics of the book of Ether. Having departed from the text he was editing, however, Moroni must return, and he does so explicitly. He will return to the point where he left off, which was introducing Ether, but Moroni doesn’t use the technique of repetitive resumption that his father (and Nephi) used. Moroni’s method is to declare explicitly that he is returning to the record after he departed from it.