Summary of Chapter 9 for Hollow City?

In Chapter Nine, the kids climbed down a ladder where a coffin should have been and into a cavernous time loop under the ground. As they stumbled through the dark, they found two blind, peculiar brothers, Joel and Peter, who used echolocation to move. The terrified boys, scared that Miss Peregrine's children are wights or hollow, whimpered in the darkness. The blind boys introduced themselves in the singular saying "I am Joel and Peter." After convincing the pair that they were not wights, the eerie brothers directed them towards their erstwhile home then disappeared into the shadows. As Miss Peregrine's brood moved in the indicated direction, their ears popped because they had moved into a ymbryne's time loop. Unlike Miss Wren's peculiar animal time loop, the wights had ransacked Miss Thrush's time loop and consumed many of the peculiar children. After they spotted the house, the group passed the crumbling bodies of dead peculiars, one with a tag labelling it as Mr. A. F. Crumbley's remains, and then into the building.

A telekinetic, deranged girl named Melina Manon confronted the group as they searched for a peculiar pigeon. Horace, the dreamer, finally convinced Melina that they were friendly peculiars trying to save their ymbryne by reciting obscure facts about Melina's life. The girl and the pigeon, named Winnie, introduced themselves, but Jacob felt two, powerful hollows rushing towards them and the children fled. On a hunch, Jacob warned the others that hollows could sense peculiars if they used their powers. the group ran out of the time loop of the captured ymbryne, Miss Thrush and back into 1940 London where bombs were falling.