Umm . . . about that "mass grave".
The term was "common grave". That meant it was not where nobles and royalty were buried. Had he taken better care of himself and lived a bit longer he might have rated an upgrade on that.
It is true that only the gravediggers were at his graveside. That was proper procedure at the time. Paleo-meteorologists have studied this in great detail, and have shown with great confidence that the wind was blowing very strong that day - similar to our Santa Anas here in Los Angeles.
Under those circumstances, especially considering the fancy dress of the time, the funeral party stayed inside where the ceremony was held, and only the gravediggers went out with the casket.
All this stuff and a lot more has been covered over the years in the Archeology magazines I subscribe to, and the Smithsonian magazine.
Yes, exact cause of death is still uncertain. He had a bunch of stuff going on, any one of which could have killed him, but it was probably several of them - answers are seldom as simple as some might desire.
