Set a cadet to catch a cadet

“Set a cadet to catch a cadet” is Edgar Allan Poe’s half-muttered summary of Augustus Landor’s plan to enlist him as an observer inside the academy. The phrase captures both the proposed method and its unsettled premise: Landor does not yet know whether the person under suspicion is a cadet, but believes an insider could help him find out.

Origin and Context

Landor introduces the idea after telling Poe he has learned something from noticing a fellow turn his head, comparing that observation to Poe’s earlier recognition that Cadet Loughborough was missing steps during parade. The comparison makes observation itself the link between the two men: Poe has already shown an eye for small deviations, and Landor now proposes directing that attention toward the investigation.

Poe responds by staring at his boots and saying the phrase half to himself. Its compact, balanced wording recasts Landor’s longer proposal as a catchphrase, while preserving the uncertainty that Landor has explicitly acknowledged: the target might not be a cadet at all.

Meaning and Use

Landor answers that an inside observer would be a great help and identifies Poe as especially suited to the challenge. The expression therefore names a practical investigative arrangement, not a confirmed conclusion about the suspect’s identity. Its repeated word, “cadet,” makes the method sound almost circular: someone within the academy is to watch for someone who may also belong to it.

Poe asks whether observation is the full extent of his mission. Landor says they will learn more as the inquiry proceeds and that Poe can train his eyes according to what they discover. The phrase thus marks the beginning of a task whose focus is still developing, rather than a settled assignment with known evidence or a known culprit.

Narrative Significance

The line gives a memorable verbal shape to the investigation’s reliance on attention, access, and inference. Landor’s reference to Poe catching Loughborough’s missed steps establishes a precedent for noticing behavior; the new proposal turns that skill from an incidental observation into a deliberate role in the inquiry. At this point, however, the phrase promises a method, not a result: the identity of the person being watched remains open.