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
Object appeared to be moving up and down and from side to side. At one time the object was covered by a cloud but the light could be seen thru the cloud. It was the same color as a star only very much brighter sometimes changing to a more reddish hue then turning white or yellow. At first it did not appear to be traveling at any speed. Then it seemed to go up and down and sometimes change off and go from side to side at what seemed to be a very great speed. It seemed pretty high in the air - too high to be any kind of a light from the ground. There was no beam. No sound could be heard. A faint exhaust trail was discernible when it moved up or down or from side to side. Finally it began to move away toward the SW at very great speed and disappeared over the horizon at about 20:00. See: 48, 48b, 48c, 48d & 33, 33a, 33b, 33c, 33d, 33e, 33f & 30 and 32.
Official release, from the pursue collection. The PDF is mirrored here; the original link is under it. The text was read from the page images by an OCR model; expect the odd misread word. 209 pages are in the text index: search them above, or from the library's search.