He returned to the grave only once … There'd been no need for a tombstone after Buffy had dug herself out of the grave … Buffy had returned … Buffy had been in Hell, that's what Willow was saying. Lost in his own personal nightmare, his Slayer dead, Rupert hadn't given it any thought. It was possible. Her death had closed portals between many different hells. Buffy could have been caught in one.