Oil! by Upton Sinclair

Bunny spent that summer "playing about," as the phrase ran; he read a few books on the international situation, he studied some of the confidential reports of Vernon Roscoe's foreign agents, and watched the derricks climb over a couple more hills of the Ross Junior tract. Bertie telephoned, insisting that he should make his debut into society and meet some "eligible" girls; so he went with her to spend a week at the camp of the ultra-fashionable Woodbridge Rileys, located high in the mountains, in a club to which only the elect might attain. Here people boated and swam, but otherwise lived as complicated lives as in the city, tangled in the same web of social duties and engagements, and dressing several times a day. They drank a great deal at dinner, and danced to the music of a Negro jazz orchestra until daybreak, after which the young people would go horseback riding, and have a late breakfast, and sleep a couple of hours before keeping a luncheon engagement.

Here Bunny got to know Eldon Burdick, who had been his sister's favored suitor for a couple of years. Just what was their relationship Bunny was not sure. Dad had ventured a jest about an approaching wedding, but Bertie froze him; she would attend to her own engagements, with no parental meddling. Now Bunny discovered that the pair were quarreling; he could not help overhearing them, and seeing tears in his sister's eyes. She was angry because Eldon would only spend a weekend at the camp, and he was angry because she punished him by dancing too often with some other man. But neither of the pair offered any confidences to Bunny, and he did not seek them.