Fresh Blackberry Pie

1 9" pie shell with top crust Unbaked
1 c sugar
5 T flour
1/2 t cinnamon
1/4 t salt
4 c blackberries, fresh
2 T butter

Preheat oven to 425 degrees.

Mix sugar, flour, cinnamon & salt together & carefully blend through the berries. Pour berries into unbaked pie shell. Dot with butter. Cover with top crust, flute edges & vent top. Bake at 425 degrees for 15 minutes, then reduce oven heat to 350 degrees and bake for 30 minutes longer, or until golden brown.