Springer Mound is a low hill on the land of Harold Jennings just outside the Suffolk village of Clare Melford. Andrew Saunders and Nathaniel Browne explored the hill and discovered a ring of nine holes surrounding a pool of viscous, tar-like liquid on its summit, which smelled of rotting fruit.

On its overgrown lower slopes, Saunders located nine uprooted obelisks, almost certainly the 'nine teeth' spoken of by Alexander Roby. These obelisks were of recent manufacture and had strange lines of poetry engraved upon them, referring in one place to 'Hastur'.

Two flying creatures endlessly circled the Mound at a great height, and when Harold Jennings, in an attempt to scare Saunders off his land accidentally discharged his shotgun into one of the stones, one of these creatures swooped down to attack, revealing the true nature of The Springer Mound Monsters.

The nine stones and the smell of rotting vegetation both appeared in the dream that Doctor Frederick Bartlett had while visiting Weobley.

The stones were removed by truck a week or so after Jennings' death and taken to Scotland. The creatures apparently disappeared at the same time.