The WPA writers project in 1937 interviewed John B. Filhiol, who told the following story.
Paul and Agatha were two of the slaves owned by Edward Landry Grammont Filhiol, son of Don Juan. Being of French blood, Paul and Agatha were great lovers of gumbo file. They smoked garfish in their chimneys to preserve them with the many herbs used in French cooking. When the slaves died, they were buried on a mound on the Filhiol Plantation. As a result of their having eaten so much gumbo file and spiced garfish during their lives, sassafras trees sprang up on their graves. They are still there and no one planted them.