Mix together;

3/4-cup sugar
1/4-cup butter
1-egg
 

Stir in - 1/2-cup milk
 

Sift together;

2-cups flour
2-teaspoons baking powder
1/4-teaspoon salt
 

Blend in 2 - cups Blueberries.  Spread batter in greased and
floured square pan.
 

Mix together;

2/3-cup sugar 
1/3-cup sifted flour
1/2-teaspoon cinnamon
1/3-cup-melted butter
 

Sprinkle above on top and bake at 375 degrees for 35-40 minutes.