"But Leopold was past all pleasures now. He was failing fast. Late in August, on her return from Germany, Victoria paid her final visit to him. On October 18th, Palmerston died, begging his grandson, Ashley, to read him the sixteenth clause in the Belgian Treaty; the clause that guaranteed the independence and neutrality of Belgium Leopold remarked that since his most stubborn enemy had gone, he was sure to follow soon."
January 1, 1970
https://en.wikiquote.org/wiki/Leopold_I_of_Belgium