Beginning in 1900, colonial railway departments in Sierra Leone, the Gold Coast, and Nigeria began turning to the Caribbean for skilled labor instead of hiring African workers. When West Indian railway workers began to arrive in West Africa, Africans were indignant, and they voiced their objections in newspapers. West Indians sometimes responded to these grievances with calls for racial unity, yet their appeals were inflected with colonial hierarchies. Such exchanges were centered on railway jobs, but they were also embedded in larger discussions about empire, race, and the legacies of the transatlantic slave trade. I argue that these exchanges reveal the significance of colonial hierarchies and diasporic tensions in the intellectual history of pan-Africanism in early twentieth-century West Africa. The article draws on newspapers and archival research from West Africa, the Caribbean, and the UK.