In the summer of 1978 I stayed in a house in Maine that had a widow's walk, a very small room at the top of the house. It looked out over the harbor and had a good view of the boats as they came home. Many years later while thinking about that time, this song materialized. The reference to "silkie" is the legend of the seal-people who have the ability to come on land and live as humans. However, if they return to the water they revert to their original form forever.