said that Barbadians, considered British subjects as part of the empire, had been ill-treated while working for PAC, which gave the government a reason to intervene. Ordinarily it could not investigate the internal affairs of another country. American civil engineer Walter Hardenburg had told Paternoster of witnessing a joint PAC and Peruvian military action against a Colombian rubber station, which they destroyed, stealing the rubber. He also saw Peruvian Indians whose backs were marked by severe whipping, in a pattern called the Mark of Arana (the head of the rubber company), and reported other abuses. PAC, with its operational headquarters in Iquitos, dominated the city and the region. The area was separated from the main population of Peru by the Andes, and it was 1900 miles from the Amazon's mouth at Pará. The British-registered company was effectively controlled by the archetypal rubber baron Julio César Arana and his brother. Born in Lima, Arana had climbed out of poverty to own and operate a company harvesting great quantities of rubber in the Peruvian Amazon, which was much in demand on the world market. The rubber boom had led to expansion in Iquitos as a trading center, as all the company rubber was shipped down the Amazon River from there to the Atlantic port. Numerous foreigners had flocked to the area seeking their fortunes in the rubber boom, or at least some piece of the business. The rough frontier city, both respectable businesses and the vice district, was highly dependent on the PAC. Casement traveled to the Putumayo District, where the rubber was harvested deep in the Amazon Basin, and explored the treatment of the local Indians of Peru. The isolated area was outside the reach of the national government and near the border with Colombia, which periodically made incursions in competition for the rubber. For years, the Indians had been forced into unpaid labor by field staff of the PAC, who exerted absolute power over them and subjected them to near starvation, severe physical abuse, rape of women and girls by the managers and overseers, branding and casual murder. Casement found conditions as inhumane as those in the Congo. He interviewed both the Putumayo and men who had abused them, including three Barbadians who had also suffered from conditions of the company. When the report was publicised, there was public outrage in Britain over the abuses. Casement made two lengthy visits