also published criticism of the novel, most prominently by Martin Delany. In a series of letters in the paper, Delany accused Stowe of "borrowing (and thus profiting) from the work of black writers to compose her novel" and chastised Stowe for her "apparent support of black colonization to Africa." " Martin was "one of the most out-spoken black critics" of Uncle Tom's Cabin at the time and later wrote Blake; or the Huts of America, a novel where an African American "chooses violent rebellion over Tom's resignation." White people in the American South were outraged at the novel's release, with the book also roundly criticized by slavery supporters. Southern novelist William Gilmore Simms declared the work utterly false while also calling it slanderous. Reactions ranged from a bookseller in Mobile, Alabama, being forced to leave town for selling the novel to threatening letters sent to Stowe (including a package containing a slave's severed ear). Many Southern writers, like Simms, soon wrote their own books in opposition to Stowe's novel. Some critics highlighted Stowe's paucity of life-experience relating to Southern life, saying that it led her to create inaccurate descriptions of the region. For instance, she had never been to a Southern plantation. Stowe always said she based the characters of her book on stories she was told by runaway slaves in Cincinnati. It is reported that "She observed firsthand several incidents which galvanized her to write [the] famous anti-slavery novel. Scenes she observed on the Ohio River, including seeing a husband and wife being sold apart, as well as newspaper and magazine accounts and interviews, contributed material to the emerging plot." In response to these criticisms, in 1853 Stowe published A Key to Uncle Tom's Cabin, an attempt to document the veracity of the novel's depiction of slavery. In the book, Stowe discusses each of the major characters in Uncle Tom's Cabin and cites "real life equivalents" to them while also mounting a more "aggressive attack on slavery in the South than the novel itself had". Like the novel, A Key to Uncle Tom's Cabin was a best-seller, but although Stowe claimed A Key to Uncle Tom's Cabin documented her previously consulted sources, she actually read many of the cited works only after the publication of her novel. Uncle Tom's Cabin also created great interest in the United Kingdom. The first London edition appeared in May 1852 and sold 200,000