September 23, 1948 — San Pablo, CA
12:02 p.m. Retired US Army Col. Horace S. Eakins and Sylvester Bentham, located four miles east of San Pablo, California, see a twin-engine bomber aircraft pass low overhead to the southeast then see far beyond and high above it, possibly 1 mile higher, a strange fast-flying, irregularly shaped, translucent white, “amoeba” headed east. It is the size of a four-engine bomber, with three appendages in front and two trailing with a dark gray spot (possibly spherical) near the center, which remains stable in motion. The arms of the amoeba are undulating as the object wobbles. It disappears suddenly, leaving no trail. [Eberhart]
Letter:
Summary:
Report:
Sources:
Brad Sparks, Blue Books Unknowns Catalogue, Case 116, p. 38;
NICAP, “Strange Object above Bomber”;
[PURSUE release, pp. 10–13]
https://www.war.gov/medialink/ufo/release_1/38_143685_box7_incident_summaries_173-233.pdf