midnight
She has the appearance of being thirty , whereas she is said not to be more than twenty years old : she is a true giantess . '' `` The poor thing ! '' said Louise ; `` every one judges from the exterior . All who are around her hate her , I believe , because her eyebrows are grown together , and that is said to be a sign that she is a nightmare : -LSB- Note : This superstition of the people is mentioned in Thieles 's Danish traditions : `` When a girl at midnight stretches between four sticks the membrane in which the foal lies when it is born , and then creeps naked through it , she will bear her child without pains ; but all the boys she conceives will become were-wolves , and all the girls nightmares . You will know them in the daytime by their eyebrows grown together over the nose . In the night she creeps in through the key-hole , and places herself upon the sleeper 's bosom . The same superstition is also found in German Grimm speaks thus about it : If you say to the nightmare , -- Old hag , come to-morrow , And I from you will borrow , it retreats directly , and comes the next morning in the shape of a man to borrow something . '' -RSB-