PURSUE Record — FBI 62-HQ-83894 — Danforth Illinois Instrument Examination September 1947: Federal Bureau of Investigation · Illinois · 1947

FBI case file 62-HQ-83894 is a declassified PDF document released by the Federal Bureau of Investigation as part of PURSUE Release 01 on May 8, 2026. Its internal case slug — danforth-illinois-instrument-examination-september-1947 — places the record in Danforth, Illinois, in September 1947, and characterizes the subject matter as an instrument examination. It is one of 120 PDF documents included in the release, drawn from the FBI's long-running flying-discs case file series covering 1944 to 1973.

What this record contains

The document is a single-part PDF originating from the Federal Bureau of Investigation under case number 62-HQ-83894. The public release inventory identifies the record primarily through its internal slug — "danforth-illinois-instrument-examination-september-1947" — which encodes the geographic location as Danforth, Illinois, the time frame as September 1947, and the subject matter as an instrument examination. Beyond those slug-derived indicators, the public release does not include detailed metadata for this record beyond what is derivable from the slug itself. No narrative summary, witness count, resolution status, or evidentiary inventory has been published alongside the file in the PURSUE Release 01 inventory.

The official description acknowledges this directly: "Case-specific metadata is sparse in the public release inventory; the analysis relies on the slug semantics, the broader institutional posture of the FBI during the case period, and the temporal/geographic context." The record is catalogued in full on the SkyLens UAP files page alongside the rest of the PURSUE Release 01 set.

Historical & documentary context

September 1947 sits at the center of the first major wave of American UAP institutional response. Kenneth Arnold's widely reported June 1947 sighting over Mount Rainier had, by that summer, generated hundreds of filed reports and genuine concern at senior levels of U.S. military and civilian agencies. The Army Air Forces launched Project Sign in late 1947, and the FBI — at the explicit request of Army Air Forces Intelligence — had agreed that summer to assist with investigations into flying disc reports deemed potentially relevant to national security. The Danforth record falls precisely within this window of peak inter-agency coordination and institutional anxiety about unidentified aerial phenomena.

The phrase "instrument examination" embedded in the slug carries some interpretive weight. Within the investigative vocabulary of 1947, this language most plausibly refers to a physical examination of an object or piece of hardware — rather than a purely observational report of something seen in the sky. That framing suggests this case may have involved the collection or inspection of tangible material rather than a witness account alone. Danforth is a small agricultural community in Iroquois County, central Illinois; the public release provides no geographic or circumstantial detail beyond the location name itself.

What this does and does not prove

The documented facts here are narrow. The FBI opened and retained a case file associated with Danforth, Illinois, in September 1947, and that file concerned something described internally as an instrument examination. Nothing in the available metadata confirms what was examined, who conducted the examination, what findings were recorded, or whether the subject was ever identified. The public release assigns no resolution status to this record. Treating the existence of the case file as affirmative evidence of an anomalous phenomenon would be an overreach; treating it as trivial without reviewing the document itself would be equally premature. The record is open — its contents are their own evidence, and the contents have not been publicly summarized.

How it fits PURSUE Release 01

This record is part of the FBI archive strand within PURSUE Release 01, a sub-series of historically significant case files drawn from the Bureau's flying-discs investigation program spanning nearly three decades. Alongside the contemporary Department of War sensor records and NASA archive imagery also present in the release, the FBI PDFs provide a documentary foundation for tracing how U.S. civilian and federal law-enforcement agencies tracked, logged, and assessed anomalous aerial reports during the Cold War's opening years. Additional coverage of the broader release, including records from other agencies, is available across the SkyLens PURSUE editorial series and on the UAP files index.

Editorial note: This analysis is independent commentary on a publicly released document. The original record, source links, and full release metadata are catalogued on the SkyLens UAP files page alongside every other case in the PURSUE Release 01 set.