I was contemplating going to the beach again today, but it is a 3 hr drive, one way.
The reason for my hesitation is the clue that states one of the two things ”mark shall stand the test of time”. As stated before, I can understand how the solve might fit, but it would be true about both things, not just one, and for the same reason. The best one to count the paces from is obvious, as it will put you squarely on the open shore, whereas the other will not.
Just feeling a bit blue not knowing whether to stay home and rest or go out digging…