Before attempting to use as a historical source the Lucknow Lunatic Asylum case notes of the British colonial period in India, it is necessary to determine which methodological approach is most viable. The approach of historians, who attempt retrospectively to diagnose the patients of the past from the clinical details of case notes, does not satisfactorily deal with the criticism that data on medical case notes is less a series of objective observations and more a product of the power relations (...) of the period. In contrast, medical and postcolonial historians treat the information on the case notes as a set of discursive constructions rather than a series of objective observations. By tracing the discourses in operation during construction of the Lucknow case notes, this paper identifies the ways in which the notes can be read as a series of colonial and medical discursive representations rather than as a set of clinical data. (shrink)