Open D , History of Open D Sebastapol Vestapol tuning. On my youTube Channel since July 2012.
Henry Worrall, born in Liverpool, England, on April 14, 1825, immigrated to this country with his family in 1835. After a precarious boyhood spent in Buffalo and Cincinnati, he came to Kansas in the late 1860’s.  There is no record that Worrall lead art training of any kind. He had been a glass cutter in Cincinnati and as a young man had achieved a local reputation as a guitar player and teacher and composer of guitar pieces. In fact, one of his compositions, “Sevastopol,” which he sold to a publisher in Cincinnati for $15, subsequently became exceedingly popular and sold thousands of copies. In 1868 Worrall arrived in Topeka, where
Stefan Grossman 3 detailed lessons on this tuning.
Sears sold many of their mail order guitars with a booklet of lessons often including Sebastapol, this is very likely a source of much of the blues cliche tunings and runs, riffs and structure melded with the gospel and field holler and african roots vibe part of the gumbo of influences that fused into Delta Blues and Piedmont Blues and on into Jazz.