This building still stands. https://www.google.com/maps/place/Tremont+Temple+Baptist+Church/@42.357601,-71.060689,3a,75y,90t/data=!3m8!1e2!3m6!1sCIHM0ogKEICAgID5vsnUhAE!2e10!3e12!6shttps:%2F%2Flh3.googleusercontent.com%2Fgps-cs-s%2FAHVAwepAtnkIxmN4M0IjJPPFnuBeHGdrc9tuXUcS9cWfMZvT71jVvUMIuBy1WcNYxtbsivbYLKri69BBKQtC9P5jcJ7XqtN2S6yPMxvoBA2A6MZvgsq_txxZjHo9pv3mVeSJdOsvep7vng%3Dw89-h86-k-no!7i2946!8i2845!4m7!3m6!1s0x89e37084a715bddf:0x5efdbd24a2fe86c7!8m2!3d42.357601!4d-71.060689!10e5!16s%2Fm%2F0ch2_6r?entry=ttu&g_ep=EgoyMDI2MDIwMS4wIKXMDSoASAFQAw%3D%3D

Abolitionist (A group against slavery) network

Douglass published his own speech. https://www.loc.gov/collections/frederick-douglass-newspapers/about-this-collection/

The Civil War was between the North and the South. Boston is in Union territory; in the North