Ib. sc. 7. Note how the King first awakens Laertes's vanity by praising the reporter, and then gratifies it by the report itself, and finally points it by—
... “Sir, this report of his
Did Hamlet so envenom with his envy!”
Ib. King's speech:—
“For goodness, growing to a pleurisy,
Dies in his own too much.”
Theobald's note from Warburton, who conjectures “plethory.”
I rather think that Shakespeare meant “pleurisy,” but involved in it the thought of plethora, as supposing pleurisy to arise from too much blood; otherwise I cannot explain the following line—
“And then this should is like a spendthrift sigh,
That hurts by easing.”