Henry Temple, 3rd Viscount Palmerston Quote

Lord Palmerston, with characteristic levity had once said that only three men in Europe had ever understood [the Schleswig-Holstein question], and of these the Prince Consort was dead, a Danish statesman (unnamed) was in an asylum, and he himself had forgotten it.

R. W. Seton-Watson Britain in Europe 1789–1914 (1937) ch. 11