Enthralled by his accounts of American politics from the British Embassy in Washington, Churchill invited a "Mr. I. Berlin" to lunch. The invitee turned out to be Irving Berlin, not Isaiah, which produced a confusing dialogue around the table. ("Tell me, Mr. Berlin, what is your greatest work?" ... "White Christmas.") Later, meeting the real Isaiah Berlin, WSC acknowledged "the grave solipsism I was so unfortunate to have perpetrated."