"A covariance map revealing correlations between electrons emitted from neon" (and from some N2 and water vapour contamination). The map is constructed shot by shot from electron energy spectra recorded at the photon energy of 1062 eV, which are shown along the "x" and "y" axes after averaging over 480 000 FEL shots. Volumes of the features on the map give relative probabilities of various ionization sequences, which can be classiﬁed as: (a) Ne core-core; (b) H2O core-core, core-Auger, and Auger-Auger; (c) Ne Auger-Auger; (d) Ne valence-valence; (e) N2 core-Auger; (f) H2O core-valence; (g) Ne core-Auger; (h) Ne core-valence; (i) double Auger and secondary electrons from electrode surfaces; and (j) Ne main (core) photoelectron line.