- Two letters from Lysander Spooner to George Bradburn. A two-page note dated June 21, 1845, notifying him that Amasa Walker will be visiting the store of Emerson, Harris & Potter if Bradburn would like to see him. Followed by a one-page letter dated October 17, 1845, notifying him that he must leave Boston to attend to his mother in Athol [Massachusetts]., New-York Historical Society
- One-page letter dated July 18, 1848, from L. [Lysander] Spooner in Boston [Massachusetts] to [George] Bradburn, notifying that he is leaving Boston for Athol because he has "nothing to eat" and that "the Abolitionists must flounder in their ignorance until they are willing to give me bread in exchange for knowledge.", New-York Historical Society