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.
“Anderson”4 pages
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## CONFIDENTIAL Capt Jack Peck and his Copilot Vince Daly stated that on 4 Aug at sunset they sighted and followed a"flying saucer" northwest of Bethel, Alaska. The object which appeared as large or larger in mass than a C-54 and black in color appeared silhouetted against a brilliant evening sky. In order to avoid a possible collision (being unable at first to determine in what direction the object was moving) they pulled up to about 1200 ft in order to avoid possible collision. The object crossed their path at right angles to them. Seeing that it was moving away from them at a very rapid rate and flying at an altitude of from 500 to 1,000 ft they swung in behind it and followed it at an air speed of 170 MPH but the thing was out of sight in four minutes. They state the object was smooth-surfaced and streamlined and resembled that of a C-54 without motors (from the rear) and was without wings or any visible means of propulsion whatever. Wind was negligible and it was on a NW course. Official in Charge of the Airlines for which Peck was working states that the pilot is not the "imaginative type".
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.