The marks on the seawall were supposed to show water levels. Beneath one, a resident had scratched a sentence: this is where I left. Years later, his son returned to finish it, carrying a letter found among the funeral papers.
He had assumed his father meant leaving the city. The letter described a night of flooding and a bicycle abandoned against the wall while he helped a neighbor move upstairs. He never recovered the bicycle. In family arguments, the lost machine had become shorthand for money he could not afford to waste.
The son found the neighbor still living nearby. She remembered the help but not the carving. She said his father returned the next day with groceries, walking the whole distance. The sentence on the wall had reduced an act of care to the thing it cost him.
The son put his chisel away. Instead of altering the marker, he copied the letter for the neighborhood archive. On his way back, he noticed that the carved sentence disappeared at high tide. The wall retained the loss; the letter could now retain what happened around it.