Related Clues:

• How the last of the rivers get back to the last of the week that came first
• Was seated and led back to the mouths
• Seated and went in front where the rivers end
• More than a dribble comes out of these mouths
• Perhaps the mouths of the Dee, by the sound of it
• Let them get into sad ends for the rivers
• Was seated, leading up to the rivers' ends (6)
• Let these mouths get to 21 down at the flowers ends
• They're salted when they reach salt water
• Mouth formations
• Retiring satisfied with oneself, with toothless grin
• River mouth deposits
• Triangular soil deposits
• River-mouth regions
• Triangular areas