Murder in the Gunroom by H. Beam Piper

Pre-dinner cocktails in the library seemed to be a sort of household rite -- a self-imposed Truce of Bacchus before the resumption of hostilities in the dining-room. It lasted from six forty-five to seven; everybody sipped Manhattans and kept quiet and listened to the radio newscast. The only new face, to Rand, was Fred Dunmore's.

It was a smooth, pinkly-shaven face, decorated with octagonal rimless glasses; an entirely unremarkable face; the face of the type that used to be labeled "Babbitt. " The corner of Rand's mind that handled such data subconsciously filed his description: forty-five to fifty, one-eighty, five feet eight, hair brown and thinning, eyes blue. To this he added the Rotarian button on the lapel, and the small gold globule on the watch chain that testified that, when his age and weight had been considerably less, Dunmore had played on somebody's basketball team. At that time he had probably belonged to the Y. M. C. A., and had thought that Mussolini was doing a splendid job in Italy, that H. L. Mencken ought to be deported to Russia, and that Prohibition was here to stay. At company sales meetings, he probably radiated an aura of synthetic good-fellowship.