Lewis Jackson Mann was born in Oran Ohio on November 26, 1829 to Isaac and Catherine Mann. He married Martha Tyler in 1860. They resided in Oran, Ohio for several years. Lewis was an expert carpenter. He was known for quality workmanship by customers as distant as New York.
Lewis was drafted during the Civil War. His brother lost an arm, and his brother-in-law and several cousins died in service, thus he had no desire to serve in the military.
When he received his first draft notice, he replied in writing that he was crippled, and asked to be dismissed from service. The government ordered him to appear in Greenville, Ohio for a medical exam within six months. Lewis immediately began to build up what became a significant amount of callous on one hand by constantly squeezing corn cobs.