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This US Air Force Project Blue Book case file on Kenneth Arnold's sighting of nine objects near Mount Rainier, Washington, on 24 June 1947 was released through The Black Vault. It contains the Project 10073 record card, which concludes the objects were a mirage, plus Arnold's telegram, questionnaire data and interview notes. It also includes J. Allen Hynek's analysis arguing the objects were closer and slower than Arnold estimated. Other items are David Johnson's sworn statement on a Boise sighting, a Tacoma investigation telegram and news clippings.
Read from the scan by GLM-OCR; expect the odd misread word.
## UNCLASSIFIED 241 Battery Street, San Francisco, showed no trace of any object. Stolr says that if it were more than a mile distant from me at the size I described, the object would not have registered sufficiently on the film to be shown. He said it probably was too far away to be apparent even through great enlargement of the negative, and enlargement in that case is limited because of the size of the film and the fact I did not have any telescopic equipment on the lens. The exposure was f.16, stop set at infinity, at a speed of 16 frames per second. I have worried over this matter a great deal since seeing it. I "took myself aside" and said, "come now, don't be stupid." But I cannot bring myself to the point of thinking I did not see anything. The impression of the moment was too vivid, too realistic, and I knew in the air when I saw that partial slow roll or barrel roll, that I was not a victim of illusion. I trust this matter will be of help to those investigating the flying disc phenomena which have been reported. A chart is attached depicting the movements of the object as I saw it. This statement is made voluntarily and freely, in response to the request of Mr. Brown and Captain Levidson, who called on me this morning. ## /s/ n Subscribed and sworn to before me, a notary public, this 12th day of July, 1947.
Document, cited by the archive. 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. 62 pages are in the text index: search them above, or from the library's search.