I went to Dover for an interview this morning. While walking along, I was thinking about the song, The White Cliffs of Dover, made famous by Dame Vera Lynn during that dreadful decade, the 1940s, musically speaking anyway. My grandmother used to sing it to us when we went to visit her. The lyrics used to puzzle me even then. It goes, "There'll be bluebirds over, the white cliffs of Dover, tomorrow, just you wait and see." What are bluebirds? Did she mean blue tits? I didn't think blue tits nested on cliffs. Was there a species of blue seagull? I've never seen one or heard of one, at least not one that was native to Britain. If she had sung, "There'll be white birds over the white cliffs of Dover," it would have made more sense, but then there were white birds flying over the cliffs of Dover during the whole course of the war, so the lyric would have been redundant. I don't suppose the air raids would have bothered them enough to drive them away.