I feel that the origins are very hard to track down. According to some blues legends, the blues and talkin' blues could be traced back to the slaves. They were not allowed to sing in the fields so they would talk the blues. Not only blues performers used this style, folk performers such as Woody Guthrie brought and adapted these talkin' blues on to radio or recording. Bob Dylan has done some talkin' blues and I've heard this in country as well. In fact, I worked on a song just last week that used the old folk elements of the talkin' blues in a obscure introduction to heavy rock song.