Of course he knew.
The old man sat silent, his hands folded on the plastic tablecloth, staring at Ennis with an angry, knowing expression. Ennis recognized in him a not uncommon type with the hard need to be the stud duck in the pond.
Jack had, over the years, dropped all sorts of hints, and when Ennis showed up, he could finally put a face on 'Ennis del Mar...'