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.
“Hamilton”5 pages
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## RESTRICTED At 2045 hours, 6 July 47, Staff Sergeant Livingston's attention was called by a neighbor (a Mr. Herman M. Sockwell) to witness some "flying discs" The objects appeared in the west of Birmingham and were traveling southeast. They appeared to be 2000 above the horizon at a 45° angle at an unestimated distance away. They were approximately 2 ft in diameter, and round. They produced a dim glow of light and were traveling at an estimated speed of 500 to 600 MPH. The object (or objects) appeared to be traveling in a definite arc rather than straight, and as soon as one was out of sight, another would appear behind it but not always in the same path. One seemed to come straight up. The view of its source was obstructed by a nearby house but upon reaching the altitude of approximately 2000 ft it started off in the same direction as the others. Sergeant Livingston says that he did not at any time see more than one object at a time, and tho it could have been one object it was his personal opinion that there were seven to ten objects. The discs were silent and appeared composed of a single light.
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.