He looks up into the burning city. He considers adding something like, "if he’s still alive," but nobody likes a whiner. So he just signs the fucking thing. The padre adds his signature as witness. Just to add some extra credibility, Shaftoe pulls off his dog tags and wraps the will around them, then wraps the dog tags’ chain around the whole thing. He passes it down to the stern of the boat, where the boatman pockets it and cheerfully agrees to do the right thing with it when he gets back to Calamba.