Complex sentence: The MS M.383 was almost certainly longer when it was first written; its text makes reference to sections on poleaxe, dagger, and grappling which are not present in the book's current state.
Split into simpler sentences: The MS M.383 was almost certainly longer when it was first written. Its text makes reference to sections on poleaxe, dagger, and grappling which are not present in the book's current state.