Lord Byron
The Works of Lord Byron, Vol. 7 (Epigrams)
Epigrams

Oh, Castlereagh! thou art a patriot now;
Cato died for his country, so did'st thou:
He perished rather than see Rome enslaved,
Thou cut'st thy throat that Britain may be saved!
So Castlereagh has cut his throat!—The worst
Of this is,—that his own was not the first.
So He has cut his throat at last!—He! Who?
The man who cut his country's long ago.