Possible Clues:

• Triangular islands at mouths of rivers
• Some fraternity members
• Triangular patches of land at mouths of rivers
• Sites of big deposits
• The Dee might have one of them 96)
• The sort of mouths the sort of 2 down may have
• Nile and Mississippi
• River mouth areas
• Let them get into sad ends for the rivers
• Foreign characters lasted with difficulty