The article quotes Christopher Moore at length:
"Within a stone's throw of Duffield Street, you have financiers, Arthur and Lewis Tappan on Pierrepont Street. In 1835, Lewis financed the great postal campaign which sent antislavery materials throughout the country. Congress, flooded with petitions, adopted the first slavery gag rule. That campaign started in Brooklyn."
"Half a block away at Willoughby and Duffield Streets, William Harned is purchasing land in the Adirondacks for fugitive slaves. Go another half a block and Walt Whitman, fired from the Brooklyn Eagle for writing antislavery editorials, is forming an abolitionist newspaper at the corner of Myrtle Avenue. At 227 Duffield, Harriet Truesdell involves herself in anti-slavery campaigns at a time when it was dangerous for white women to do so."