The body of the Lamb Slain with the wicked soul.
The Second Coming of Jesus, who's soul has been with the head of David's proper line.
There is also a confusion with the Lamb slain & the Lamb slain yet living who is the dragon head with the mortal wound that lived.
And all that dwell upon the earth shall worship him, whose names are not written in the book of life of the Lamb slain from the foundation of the world.
The above refers to Jesus, the book of life is a Christian referrence for those who are not denied prayer, who are not carnal & seek the Lord to obey. That is not Charles, so this Lamb slain is the former.