The presence of British subjects in the Antofagasta region between 1880 and 1930 can be observed in various fields. Their investments contributed to the establishment of railway connectivity, which began the 1870s. They controlled other private railway ventures in Taltal and Tocopilla. The main nucleus was the Antofagasta-Bolivia Railway Station. British influence was also seen in the commercial and financial activities directing the control of nitrate (saltpeter) production toward world markets. All this demanded a demographic presence fostered by businesses established in the Antofagasta area, where most of the colony members were linked to activities associated with the Antofagasta-Bolivia Railway Co. (FCAB) and the technical and administrative sectors of saltpeter companies. In this sense, the importance of these businesses created social networks, which significantly influenced the course of regional society.