This essay aims to give an account of the untold and unexpected events faced by the crew of the Compton, one of the East India Company's vessels that set out on a routine trade voyage from Deptford to Bombay in April 1723. Under the command of Captain William Mawson, scrupulous compiler of the logbook, the ship proceeded along the known routes indicated by the East India Company (EIC) charts, and through the passages recommended by the navigation manuals. Finding consonance with recent research suggestions on “alternative histories” of the EIC, this article brings to light the narrative potentialities of the logbook, which is therefore considered not only a technical device, but also a tool for reconstructing the actual experience of navigation. This is the approach of the historical geodatabase of European global navigation Global Sea Routes (GSR), which bases its research method on ship's logs and other primary sources produced by the practitioners themselves. In order to provide a richer account of the known history of the EIC's shipping in the early modern age, this essay will analyse Mawson's logbook, highlighting its peculiarities as a container for a wealth of information useful for creating a narrative construction.