Documents / Official release
This U.S. Department of War file, undated, holds checklist summaries of incidents 1 to 100 of unidentified flying objects reported in 1947 and early 1948. The first entries cover sightings of silver discs and spheres by officers and staff at Muroc Army Air Field on 7 and 8 July 1947. Next come the Portland, Oregon police reports of 4 July, a United Air Lines crew near Emmett, Idaho, and a set of 30 December flame and explosion reports from California and Nevada. The file ends with two Finnish sightings.
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.
Read from the scan by GLM-OCR; expect the odd misread word.
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Patrolman W. A. Lissy of the Portland City Police Department possesses a private pilot license. He perceived three flat round discs which flew at terrific speed in straight line formation the last disc fluttering very rapidly in a side-way arc. They saw no evidence of any motivating powers and there were no vapor or smoke trails. No sound could be heard. Ground temperature was 82 $ ^{\circ} F $ with little or no cloud formation.
NOTE: Corroroborated account. Witnessed by Patrolman D. W. Ellis (also a private pilot) Both very dependable & trustworthy officers. 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. 209 pages are in the text index: search them above, or from the library's search.