TZETZE (or TSETSE) FLY, n. An African insect ("Glossina morsitans") whose bite is commonly regarded as nature's most efficacious remedy for insomnia, though some patients prefer that of the American novelist ("Mendax interminabilis").
You cannot imagine the craving for rest that I feel-a hunger and thirst. For six long days, since my work was done, my mind has been a whirlpool, swift, unprogressive and incessant, a torrent of thoughts leading nowhere, spinning round swift and steady.
O sleep, O gentle sleep, Nature's soft nurse, how have I frightened thee, 1710. That thou no more will weigh my eyelids down, And steep my senses in forgetfulness?
Sleep is the interest we have to pay on the capital which is called in at death; and the higher the rate of interest and the more regularly it is paid, the further the date of redemption is postponed.