In the given scenario, the text that uses the word "peruse" in its traditional sense is:
- The researcher diligently perused the ancient manuscript, taking care not to damage the brittle pages as he turned them.
This sentence accurately depicts the traditional sense of "peruse," which means to read or examine carefully and in detail. In this context, the researcher is carefully examining the ancient manuscript, showing a thorough and attentive approach to studying its content. This usage aligns with the traditional meaning of "peruse" as carefully reading or examining something, rather than quickly glancing over it.