A Thomas Jefferson letter, a Babe Ruth Candy Club member card and a 1920s ruby and diamond necklace.

In Boise, Idaho, ANTIQUES ROADSHOW host Mark L. Walberg joins appraiser Colleene Fesko at the Boise Art Museum to learn about the works of outsider artist James Castle. Highlights include: a rare Babe Ruth Candy Club membership card, ca. 1926, that details tips from the Babe himself, as well as a ruby and diamond necklace, ca. 1920, that was originally mailed to the guest’s mother and sat on her front porch unnoticed for several days, valued $80,000 to $100,000.