The Night of Fear by Moray Dalton, for Dean Street December

This is my third entry for Dean Street December, and it seems appropriate for it to be a mystery by an author I’d never heard of until Dean Street Press reprinted 15 of her books. Starting in 1924, Moray Dalton published 29 mysteries, most of which feature two detectives, Scotland Yard inspector Hugh Collier and private inquiry agent Hermann Glide. I thought I had chosen the first in the series but as it is set at a Christmas house party in the country, it was still very suitable.