Whether you call it "High Tea" or "Afternoon Tea" (they are quite different! We'll discuss those differences in a later post!), here is a wonderful link to a slide show on High Tea Etiquette. Enjoy!
... elevenses became her heaven, so much the focus of her life that impatiently she took her elevenses earlier and earlier until they were finished by 8.45am, and the day lay before her, empty as a doughnut hole, all happiness shot.