  Recent reactor neutrino experiments observe an anomalous excess around 5 MeV
in the prompt energy spectra of positrons following the inverse beta decay
reaction. In this note we suggest that this 5 MeV anomaly was already present
in a much earlier experiment, which was carried out in the 1980's at three
distances from the 2.8 GW nuclear powerplant at Goesgen, Switzerland. In
particular we demonstrate with a log-likelihood test performed on the Goesgen
data that the no-anomaly hypothesis is disfavored at a level of 3.8 sigma.
