Autoionization of Frenkel excitons is re-examined as a potential source of the anthracene photocurrent at photon energies higher than 4.4 eV. A crude estimate of the rate constant suggests autoionization as a feasible depletion channel, the resultant photocurrent quantum yield being in reasonable agreement with experiment. Bounds for the thermalization radius of charge carriers produced by autoionization are estimated. The estimates, based on a simple model of charge carrier transport and scattering, are found to agree, as to the order of magnitude, with experimental data. A fit of the experimental photocurrent spectrum indicates that while in the near-threshold region the photocurrent is dominated by charge pairs produced by direct optical excitation, at higher energies the autoionization mechanism generally prevails.