Goes to the future and finds no bones. Well, yeah, actually that makes the most sense. Assuming a single timeline, you poof’d out of existence! Of course, if you did find bones, very like they are not yours and now you have a weird Memento situation where you’re investigating why you would have buried someone else’s bones in your own grave.
He actually lives a long life, and before he dies he travels back in time to after the first time he time traveled but also before visiting his own grave.
So the bones would be there when he travels to the future.
Goes to the future and finds no bones. Well, yeah, actually that makes the most sense. Assuming a single timeline, you poof’d out of existence! Of course, if you did find bones, very like they are not yours and now you have a weird Memento situation where you’re investigating why you would have buried someone else’s bones in your own grave.
He actually lives a long life, and before he dies he travels back in time to after the first time he time traveled but also before visiting his own grave.
So the bones would be there when he travels to the future.