This one belongs on the list too:

"Sobbin' Woman Blues" Elizabeth Johnson

Her "buy me a pistol" stuff is also in "Sadie Lee Blues" by Peg Leg Howell (born 1888) and "Midnight Blues" by William Moore (born 1893), in AAAB stanzas. Her "going away to worry you off my mind" stuff is also in "Goin' To Leave You Blues" by Big Boy Cleveland and "Judge Boushe Blues" by Furry Lewis (Vestapol DVD version), in AAAB stanzas.

This is all a kind of ordinary folk blues of the 1910s that, in its 16-bar form, the pro entertainment blues industry black and white (including pro jazz musicians playing blues) seems to have never taken much interest in.