The Murder at Troyte's Hill by Catherine Louisa Pirkis

"Griffiths, of the Newcastle Constabulary, has the case in hand," said Mr. Dyer; "those Newcastle men are keen-witted, shrewd fellows, and very jealous of outside interference. They only sent to me under protest, as it were, because they wanted your sharp wits at work inside the house."

"I suppose throughout I am to work with Griffiths, not with you? " said Miss Brooke.