Grease 2 large aluminum cookie sheets.
In a heavy sauce pan (I use a 5 qt Revere ware pan), heat sugar, water, syrup, and salt to a rolling boil.
Add peanuts, reduce heat to medium and cook, stirring constantly.
Cook to a hard crack (293°F) stage.
Add butter (in small pats) & stir until butter is melted and mixed in.
Add baking soda and beat rapidly until entire contents is thoroughly mixed.
Pour onto greased cookie sheets.
When cool, break into pieces and enjoy.