sentences:  The original mining claims were filed by North American ranchers and prospectors, but as the mines were developed, workers of varied ethnic groups and nationalities arrived.Among these were people of Irish, Chinese, Italian, and Slavic origin who came to Jerome in the late 19th century.By the time of World War I, Mexican nationals were arriving in large numbers, and census figures suggest that in 1930 about 60 percent of the town's residents were Latino.