Album: The Centennial Collection
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All of the Robert Johnson records that are extant were recorded in a pair of sessions in Texas: 1936 in San Antonio and 1937 in Dallas. Of course had he lived, Johnson probably would have gone on to record, and possibly even been feted more fully, as folks like John Hammond and Alex Lomax had heard those recording and wanted more, especially before they knew he was dead.
But, of course, his death is part of the legend. Not how he died, but that he died: it meant that all we would have — all we would ever have — are the fruits of those two recording sessions, meaning that his music get never got changed by time or circumstance.