Not far away was the sound of some one moving about.

Then they heard a noise of falling water, as from a faucet into a bucket.

This was followed by steps boldly approaching.
They crouched lower, breathless with apprehension.
A dark form passed by within arm's reach and mounted on a box to the fence.

It was Brick himself, resetting the trap.

They heard him arrange the slat and stone, then right the barrel and empty into it a couple of buckets of water.