Walt Bachman, well known in Minnesota as a lawyer, former chief deputy Hennepin County attorney and a member of the family behind Bachman's garden stores, was back in the Twin Cities this week to launch his new book.

Bachman, pictured, who lives in New York, has written "Northern Slave, Black Dakota" (Pond Dakota Press, $24.95), a biography of Joseph Godfrey, a fascinating and little-known figure in Minnesota history.

Bachman spoke and signed books Wednesday at the Bachman's store on Lyndale Avenue South, where the crowd included a dozen Bachman family members as well as about 10 ancestors of Godfrey, who was born in the 1830s in Minnesota, the son of a black slave woman. Godfrey, himself a slave until he ran away from his owner, later married a Dakota woman and lived much of his life with the Dakota people.

Walt Bachman's great-great grandfather, Ernst Dietrich, was among those killed in August 1862 at the outset of the Dakota War in an attack by a party of Dakota Indians that included Godfrey.

The incident in his family history led Bachman to spend more than six years researching and writing about Godfrey and about the often-ignored fact that slavery was present in Minnesota in the decades leading up to statehood, despite its being unlawful in the territory under terms of the 1820 Missouri Compromise.

"Northern Slave, Black Dakota" is a painstakingly researched and tautly written account that pieces together from scant records the early years of Godfrey, who became much better known to the history books after his imprisonment and trial for killings during the Dakota War.

Sentenced to hang, Godfrey's death sentence was among a very few that were commuted by President Abraham Lincoln. Released after several years in prison, Godfrey found his way to an Indian reservation in Nebraska, where he lived a long life, dying in 1909.

It may seem odd for someone to write the biography of a man who was alleged to have killed his ancestor on a day that is known for a pitiless bloody massacre of whites by Indians in and around what was then Milford, Minnesota. But, said Bachman, he became convinced that Godfrey, while not blameless, has been "unfairly maligned by history," a wrong he sought to correct. "Northern Slave, Black Dakota" does that with clarity and commitment. The book should compel the interest of all who are interested in 19th-century Minnesota history.

Also see the Star Tribune's recent series about the Dakota War, "In the Footsteps of Little Crow," by Curt Brown.

Joseph Godfrey, pictured on the book cover of "Northern Slave, Black Dakota," by Walt Bachman, was born a slave in Minnesota and lived the first half of his life here.