Some of them must have overlapped the Christian era.

They may have progressed intellectually in process of time.

If they had in any way so progressed, or even got the most rudimentary form of brain, they would be the most dangerous things that ever were in the world.

Tradition says that one of these monsters lived in the Marsh of the East, and came up to a cave in Diana's Grove, which was also called the Lair of the White Worm.

Such creatures may have grown down as well as up.