The Journal of a Disappointed Man is the first volume of published journal entries by English naturalist and diarist Bruce Frederick Cummings, writing under the nom-de-plume W. N. P. Barbellion.Wilhelm Nero Pilate Barbellion was the nom-de-plume of Bruce Frederick Cummings, an English diarist who was responsible for The Journal of a Disappointed Man. Ronald Blythe called it "among the most moving diaries ever created".