Thanks. Now I want to look up the Globe stories from those days.

I recall a long streak around 1960. Dorchester bay froze and some guy rode a motorcycle across it. Do you see that freeze in the records?

Make your own starter from scratch. It will take a while, but it will contain the yeast that is present in your location plus any yeast that is in the flour. Use unchlorinated spring water. Use organic flour.