Is 'The total was approximately 2800, but that is probably only a vague  he undoubtedly missed some; some have sprung up since his time (modern Hebrew, for instance); and some have vanished.' a clear rebuttal of the premise 'He was overworked. '
The total was approximately 2800, but that is probably only a vague  he undoubtedly missed some; some have sprung up since his time (modern Hebrew, for instance); and some have vanished.###He was overworked. 