Incident #210 — Boston, Massachusetts — 10 November 1948

This document details the investigation of Incident #210, a reported sighting of three unidentified aerial objects over Boston, Massachusetts, on 10 November 1948. The investigation was initiated following a postcard received by the 5th District Office of Special Investigations at Wright-Patterson Air Force Base. The witness, a retired organizer with various political and social affiliations, reported observing three fast-flying, single-engine, high-wing monoplane aircraft flying east to west over the Charles River Basin at approximately 0500 hours. The witness noted that the aircraft had no lights, were very light or white in color, and that the middle aircraft was weaving back and forth. Crucially, the witness reported that there was no sound, despite the aircraft being estimated at an altitude of 2,000 feet and traveling at 125-150 MPH. Captain Preston W. Easley of the 1st District Office of Special Investigations conducted the follow-up interview on 6 January 1949. The investigation revealed that the witness was uncooperative and had connections to numerous radical organizations, predominantly German. The investigator concluded that the witness was of average intelligence but prone to misinterpretation. The final assessment, supported by Dr. Hynek's evaluations in the Project Grudge report, stated that there was no astronomical explanation for the incident and that the objects were likely conventional aircraft, despite the witness's claim of silence. The report includes various administrative correspondence, including a letter from the Air Weather Service regarding the review of incident summaries against weather balloon data, and internal routing slips between the Air Materiel Command and the Office of Special Investigations.