What fresh light does Chapter 8 throw on the appearance of Hyde and the effect he has on other people? (PEE)

In Chapter Eight, upon entering Jekyll's home, Utterson sees that all the servants have, "huddled together like a flock of sheep." Clearly, Poole is not alone in his concern, and one maid breaks down into sobs.

Poole reveals that he has seen the person hiding in Jekyll's room. He happened upon him one day while the man was sifting through crates in the laboratory. Poole explains that the "creature," who was apparently wearing a mask, cried out upon noticing the butler, and immediately ran up the stairs. Utterson proposes that perhaps Jekyll has been, "seized with one of those maladies that both torture and deform the sufferer," and still might be able to recover. However, Poole is convinced that foul play is to blame, and that Jekyll has been murdered.