A Sourdough is a miner who has spent one winter in Alaska and "has seen the ice go out." Mrs. Sullivan is a Sourdough herself. In all she has made seven trips to Alaska extending over a period of ten years.When miners are beyond the pale of civilization, with a supply of flour but no baking powder, yeast or potatoes, they cut from each batch of bread dough a little piece, to be kept until it turns sour, and then used as leaven for the next baking.It is through this custom that the miners themselves came to be called ]sourdoughs.
