Possible Clues:

• Perhaps the mouths of the Dee, by the sound of it
• Rivers' mouths
• Was seated and led back to the mouths
• Some fertile regions
• River-mouth deposits
• Seated and went in front where the rivers end
• Let them get into sad ends for the rivers
• Lasted like triangular areas at river mouths
• How the last of the rivers get back to the last of the week that came first
• Mississippi sights