In "The Drunkard," from what does the story's pathos arise?

Pathos is the quality or power of evoking (bringing out) pity, compassion, sympathy, tenderness, and/or sorrow. Frank O'Connor has a light touch in telling about Larry's misadventures in helping his father stay away from becoming drunk, which is heightened by his use of the charming Irish vernacular: "Begor, I was not grand!" But the real tale of The Drunkard is how one man's inability to stay sober brought hardship, betrayal and sorrow upon his wife and son.

This is the core source of the story's pathos. Added to this is the pathos of the downfall (if only for a day) of Mick's son while trying to guard Mick from a downfall of his own. The evocation of pity, sorrow and compassion in the reader in the presence of a lonesome kitchen without a clock, Mick's horrible behavior, Larry's physical illness from drinking, and Larry's painfully accurate imitation of his drunken father are the footprints of pathos in The Drunkard.