It seems from my research elsewhere that these are his Complete known recordings, and he died not long after the last-dated of those.
Oh Man -{ and Woman }- , Blind Lemon Jefferson was one of the Greats of Blues guitar-playing , at least so far as can be determined because his Recording are from the initial era of Recording. I do not know whom he may have been influenced by, however listening to all he played I hear many things which influenced later era's of guitar players, both Acoustic and Electric. Also his Singing is in musical complement with his guitar playing, as was the usual for the best Blues performers who could Sing and Play an Instrument. JSP's source and Mastering of the Tracks is audibly better than some others, and also it does not cause the overly Processed sound-character of the particular remasters of Vintage recordings which attempt a surface-noise-free and low Distortion result, and those misguided attempts actually cause a different type of Distortion, in particular a partial wobbling of the Pitch of the Notes and a Fake-Timbre onto the Voices and Instruments. Yes, audible results from worn 78rpm records are not good, but the Computer-Program attempts to reduce those cause worse audible results to Listeners who know what Recordings can better sound like. JSP have achieved a sensible balance between excess wear-noise and Computer-Man Robot-type performance, as these recordings do not sound like a Robot , however a few of the Tracks do have audible results of very very worn 78rpm original discs, but I can still hear the performance of Music by a Human though all that, and most of the Tracks have less-intrusive surface-wear results.