What a singular moment is the first one, when you have hardly begun to recollect yourself, after starting from midnight slumber! By unclosing your eyes so suddenly you seem to have surprised the personages of your dream in full convocation round your bed, and catch one broad glance at them before they can flit into obscurity. Or, to vary the metaphor, you find yourself for a single instant wide awake in that realm of illusions whither sleep has been the passport, and behold its ghostly inhabitants and wondrous scenery with a perception of their strangeness such as you never attain while the dr