Atocha Spanish Silver - In 1985, one of the greatest treasure discoveries was made off the Florida Keys when the wreck of the Spanish ship Atocha was found. On board were some 40 tons of silver and gold, which in 1622 had been heading from the New World to the Spanish treasury as the means to fund the Thirty Years' War. A man from Cedartown, Georgia, was a diver on that legendary find and received two silver bars as compensation for his efforts. He's long been mystified by a strange mark that appears on one of the bars - but is mysteriously absent from the other. In Key West, HISTORY DETECTIVES host Tukufu Zuberi translates 300-year-old documents from the archives of the Spanish treasury in Seville to crack a unique code of communication among ship captains of that era.

Lucy Parsons Book - Amid the stacks at the Wesleyan University Library, a student has found a book emblazoned with the name and address of the legendary anarchist Lucy Parsons. The bi-racial (black and Native-American) activist fought in the late 1800s for the rights of the poor and disenfranchised in the face of an increasingly oppressive industrial economic system. Did this once-feared radical own the manifesto? If so, it would pose a mystery: fter Parsons died, police supposedly raided her house and confiscated all of her subversive literature. How did this book elude them? HISTORY DETECTIVES host Elyse Luray heads to Chicago, Illinois, and Middletown, Connecticut, to explore a major labor movement uprising and Parsons' abiding acts of defiance.

Ernie Pyle's Typewriter - A man in Portland, Oregon, thinks he may have a typewriter that belonged to the famous WWII journalist Ernie Pyle, America's most beloved battlefront correspondent. The contributor's grandfather told him he received the vintage "Corona 3" from Major George Pratt, who served in the Pacific and said that the typewriter belonged to Pyle. A trail-blazing reporter, Ernie Pyle was celebrated for telling the stories of "ordinary soldiers" serving in Europe. But when he followed the siren song of the Pacific, he was killed by a Japanese sniper bullet on Ie Shima on April 18, 1945. HISTORY DETECTIVES host Wes Cowan travels to Albuquerque, New Mexico, Bloomington, Indiana, and Portland, Oregon, to investigate.