Rocky Road Fudge

I have a cookbook, The Harmony Kitchen Cookbook published by the Twin Falls Chapter of Sweet Adelines, April 1977, that Grandma Birrell gave to me. I thought that it would be nice to post all of her recipes.
2 cups sugar
3/4 cup milk
2 tablespoons syrup - I am assuming karo but it doesn't say
2 square bitter chocolate
4 tablespoons cold water
1/4 teaspoon salt

Cook slowly, stir constantly to soft ball stage. Pour into bowl and cool. Add 1 tablespoon butter.

12 large marshmallows
1 cup nuts
1 teaspoon vanilla
peppermint

Cup up the marshmallows. When fudge is cool beat until it begins to set then stir in nuts, marshmallows and flavoring. Pour into buttered pan until cool and cut in squares.