Murder in the Gunroom by H. Beam Piper

There was less feuding at dinner that evening than at any previous meal Rand had eaten in the Fleming home. In the first place, everybody seemed a little awed in the presence of the new butler, who flitted in and out of the room like a ghost and, when spoken to, answered in a heavy B. B. C. accent. Then, the women, who carried on most of the hostilities, had re-erected their _front populaire_ and were sharing a common pleasure in the recovery of the stolen pistols. And finally, there was a distinct possibility that the swift and dramatic justice that had overtaken Walters and Gwinnett at Rand's hands was having a sobering effect upon somebody at that table.

Dunmore, Nelda, Varcek, Geraldine and Gladys had been intending to go to a party that evening, but at the last minute Gladys had pleaded indisposition and telephoned regrets. The meal over, Rand had gone up to the gunroom, Gladys drifted into the small drawing-room off the dining-room, and the others had gone to their rooms to dress.