Collectibles An Ultra-Rare Letter Bearing Benjamin Franklin’s Coded Signature Is Up for Sale The marking may have been a snub at the King of England.

Benjamin Franklin flew a kite in a storm and advanced humanity's understanding of electricity on this day in history, June 10, 1752. Franklin was also a U.S. statesman and founding father.

Some 30 years ago, she spotted an annotation scribbled in brown ink on the back of the letter from Franklin’s banker. It looks like an itinerary. “Sunday, 6 — Philadelphia.” Notes made by Benjamin ...