of the nature partly of man, and partly of a loftier being. These
demons are called incubi. Their home and region is the air, but this
warm world is their resort. It is not in their power to deal man great
evil, and they can do little more mischief than to trick and to annoy.
However they know well how to clothe themselves in human shape, for
their nature lends itself marvellously to the deceit. Many a maid has
been their sport, and in this guise has been deceived. It may well be
that Merlin was begotten by such a being, and perchance is of a demon
born." "King." cried Merlin suddenly, "you brought me here; tell me
now what you would, and wherefore you have sent after me." "Merlin,"
answered the king, "know it you shall. Hearken diligently, so shall
you learn of all. I commenced to build a high tower, and got mortar
together, and masons to set one stone upon another, but all the work
that the builders raised by day, adown it fell to the ground, and was
swallowed up of night. I know not if you have heard tell thereof.
The day has not so many hours to labour, as the night has hours to
destroy; and greatly has my substance been wasted in this toil. My
councillors tell me that my tower may never stand tall, unless its
stones and lime are slaked with thy blood--the blood of a fatherless
man." "Lord God," cried Merlin, "believe not that my blood will bind
your tower together. I hold them for liars who told over such a gab.
Bring these prophets before me who prophesy so glibly of my blood, and
liars as they are, liars I will prove them to be." The king sent for
his sorcerers, and set them before Merlin. After Merlin had regarded
them curiously, one by one, "Masters," said he, "and mighty magicians,
tell us now I pray you the reason why the king's work faileth and may
not stand. If you may not show me why the tower is swallowed up of
the earth, how can your divinations declare to you that my blood will
cause it to endure! Make plain to us now what troubles the foundation,
so that the walls tumble so often to the ground, and when you have