John Brown's Letters The Place: Sacramento, California Does a Californian woman own a treasure trove of John Brown's documents? Tukufu sets out to authenticate the letters and delve into her family tree to prove if she is related to the famous abolitionist. Japanese Tea House The Place: Gilroy, California How did an authentic Japanese house become part of the famed San Francisco World Fair just before World War II? The history detectives attempt to reveal the origins of the house and how it got there. Poems The Place: San Francisco, California Kathleen Wong, a second-generation Chinese-American calls in the history detectives to trace her ancestors' perilous journey to America. She wants to know whether any of the hundreds of poems left on the walls at the West Coast Angel Island detention center relate to her family.