Mollie “The Lost Chicken” Wisner was one of the most well-known musical performers in Gold Rush-era San Francisco, but she only knew one song. In 1849, nearly forty thousand fortune-seeking men flooded the streets of San Francisco, up from 1,000 the year before. Given the transitory, perilous nature of boomtowns, women were scarce; some historians estimate a 50:1 male-to-female ratio at the time. The lonely miners, sailors, trappers, and pioneers who frequented the nine-block-long red-light…