Lyric discussion by tdowling 

Cover art for Let Me Sign lyrics by Robert Pattinson

Standing by a broken tree, Her hands are all twisted, She's pointing at me, I was damned by light comin, All a while she spoke with at voice that struck up at the sky, She said, "Walk on over here to a bit of shade, I'll wrap you in my arms if only you say you'll let me, Let me sign"

Let me sign is referring to him letting her sign onto him and his world.

I love this song it was so perfect for the movie and their love story.