Jesse memorises the information from the papers.
All he can tell about the north end of the corridor (and its adjoining spaces) is that the ground is slick, churned, earth; that the ground is lumpy with uncanny solid spots the squidge and bubble when he puts his foot down, and soft spots where his feet sink deep into the muck. The scent of blood is strong.
It doesn't look like the Brood were looking for anything in particular; more likely they were making space and trying to access the bare earth under the house.
Bit of narration so Jesse can join in the Extended search