Conversation so far:
who was the first person to say sleep is the cousin of death
Thomas Sackville said, By him lay heavy Sleep, the cousin of Death in his poem Sleep.
who is thomas sackville
Thomas Sackville, 1st Earl of Dorset was an English statesman, poet, and dramatist.
did thomas sackville have a political career
Thomas Sackville, 1st Earl of Dorset was a Member of Parliament and Lord High Treasurer.
what did thomas sackville write besides his poem Sleep
Some major works by Thomas Sackville include The Tragedy of Gorboduc, “Induction”, and “Complaint”

Question: when did sackville die
Self-contained rewrite: when did thomas sackville die