SUMMARYThis paper offers practical guidance for empirical interpretation in the history of political thought, especially uncovering what authors meant and why they wrote what they wrote. I thus seek to fill a small but significant hole in our rather abstract methodological literature. To counter this abstraction, I draw not only on methodological theorising but also on actual practice—and on detective-work, a fruitful analogy. The detective analogy seeks to capture the intuition that we can potentially find right answers but must handle (...) fragmentary evidence that different people can plausibly read in different ways. Placing the focus on evidence, and on combining different types of evidence, suggests that orthodox categories like ‘contextualist’ and ‘Marxist’ too often accentuate differences between scholars. This paper instead highlights core principles that unite us—ideas that underpin good textual interpretation across all ‘schools of thought’. (shrink)