Documents / Official release
This U.S. Department of War file collects Project Sign era checklists and incident summary sheets for incidents 101 to 172. The largest item is the 18 February 1948 explosion over Norcatur, Kansas. For it the file gathers witness statements, speculative letters from Norman G. Markham, and Dr. Lincoln LaPaz's view that it was a genuine meteorite fall with curious aspects. Other entries cover B-29 crews, a two-decked wingless object over the Netherlands, a Turkish rocket report, a Moscow sighting, and George Gorman's 1 October 1948 Fargo encounter.
From the source:Release of 2026-05-08 Incident: N/A, N/A. NARA Record Group 38, catalogue id 143685. Each of these incident summaries includes a "Check-List - Unidentified Flying Objects" that contains details about the incident. Many summaries also include witness lists or statements and other narrative reports or descriptions.
“Hill”8 pages
Read from the scan by GLM-OCR; expect the odd misread word.
CHECK-LIST - UNIDENTIFIED FLYING OBJECTS 1. Date 17th May 1948 Incident #130 2. Time Night 3. Location Between Plevna and Miles City, Montana 4. Name of observer W. A. Bonneville 5. Occupation of observer Territory Mgr., B. F. Goodrich Company 6. Address of observer 415 W. Rosser Ave., Bismark, N. D. 7. Place of observation Ground, Route #212, West of Plevna, traveling west 9. Distance of object from observer At closest point, approx. 2500 feet 10. Time in sight Some twenty minutes 11. Altitude N/S 12. Speed Twice the speed of the Northwest Airlines planes 13. Direction of flight West, slightly south, then west 14. Tactics Performed arc 15. Sound None 9. Sizo Fairly large compared with an aircraft Color White - (might have had slight bluish-white tinge) 18. Shapo Ball Odor detected N/S 20. Apparent construction N/S - but apparently meteor-like 21. Exhaust trails A long bright light shooting from under it 22. Weather conditions Monnlight, but cloudy Effect on clouds N/S 4. Skotches or photographs None - Map forwarded showing location of object Manner of disappearance Flew in a dark cloud bank 26. Remarks: See Supplement
Official release, from the pursue collection. The PDF is mirrored here; the original link is above. The text was read from the page images by GLM-OCR; expect the odd misread word. 178 pages are in the text index: search them above, or from the library's search.