 His peers included Peter French, the driving force behind the "French-Glenn Cattle Company" and owner of the vast P Ranch; John Devine, the first white settler in Harney County and founder of the White Horse Ranch; and Henry Miller, head of the "Miller and Lux Company" that controlled over of land in California, Oregon, and Nevada.Hanley's property included the lower Silver Creek drainage and several lakes that provided water to irrigate his ranch lands.The ranch's riparian areas, lake shore wetlands, and grassy meadows provided habitat for migratory birds traveling along the Pacific Flyway.