The hour the dawn tide runs lowest is fixed. Anyone who argues about it all night has never held an oar.

• UlfridChief, counting knots is holding an oar too.
  ArnketilA knot doesn't push water.
  UlfridThat knot counted the day your father's ship set out.
• AslaugWater runs low, sure enough. The trouble is, the fog doesn't listen to you.