In the month after the museum’s first anniversary, Jeroen van der Meer discovered an old tide table tucked inside the bottom drawer of his grandmother’s sewing cabinet. The paper was soft with years, annotated in Hendrika’s precise script. Along the Haringvliet inlet and the North Sea margins, she had drawn tiny sandals instead of stars. At the top was a note in Dutch that made Jeroen sit down on the floor with his back against the kitchen stove.