It scared the daylights out of us!

a heap of earth; a heap of stones

[…] as it is evident the poet alludes to a trout that has caught sight of the angler, and safe he is, at least pro tem., as our pupils who first frighten the fish by walking down a poolside, and then fish up it, will find to their cost.

The two Pyramides in the middest whereof one was lately pulled downe by some that hoped, though in vaine, to finde treasure, did almost touch one another: the uttermore stand not farre off, yet almost in equall distance from these on both sides