author
1791–1862
Best known for a forceful pro-slavery tract published in the 1850s, this 19th-century writer is remembered more as a window into antebellum thought than as a literary figure. His work is now read chiefly for its historical value and for what it reveals about the arguments used to defend slavery in the United States.

by John Fletcher
John Fletcher (1791–1862) was a 19th-century American writer associated with Studies on Slavery, in Easy Lessons, first published in 1852. Library and digitized-book records consistently identify him by those dates and connect him with that book, which was issued in Natchez and circulated in multiple editions.
The book presents a sustained defense of slavery through religious, political, and social arguments. Because of that, Fletcher is usually encountered today not as a major literary stylist, but as the author of a historically significant and deeply controversial work that helps modern readers understand pro-slavery ideology in the years before the Civil War.
Reliable biographical detail about his personal life appears to be limited in the sources I could confirm here, so it is safest to keep the focus on the surviving record of his writing and publication history.