The context of discovery and collection of Siwalik fossils had far less to do with science than with the ability to effect “translations” that helped bring together a wide range of social worlds, from the Doab Canal engineers working at the foot of the Hills, surgeon-botanists at the Saharanpur Botanic Gardens, other colonial officials, the native “Hindoo” diggers and collectors, to all of whom the Siwalik Hills was a “boundary object,” a common factor that bound their lives together. In this colonial scientific collecting episode pertaining to the discovery of a new field of research, cooperation between different participants is achieved not by using methods of standardization but through an emphasis on greater heterogeneity, both in terms of the “allies” enrolled and fossils collected. Heterogeneity becomes a factor of strength rather than a weakness that deters the practice of science. This essay employs sociological reflection to examine the context of discovery, collection, and justification of a significant group of fossils in India in the 1830s–40s.