Johnsons Park is located on Fond du Lac Avenue, between 17th and 20th Streets. It is a historic area which played an important role in the Underground Railroad during the Civil War. The park, named for C. L. and Cleopatra Johnson, community business leaders and benefactors, was once part of Samuel Brown’s farm. In July of 1842, 16-year-old Caroline Quarlls, a runaway slave from St. Louis, was hidden there. Her arrival inspired local Abolitionists to organize an “underground railroad” to assist and protect fugitive slaves and Caroline became its first “passenger.” Wisconsin became an Abolition leader and Wisconsin’s Supreme Court was the only one to rule the Federal Fugitive Slave Act unconstitutional.