I spent a lot of time in the car today with 2 Blind Boy Fuller CDs to keep me company, and I noticed that among the 46 songs on those 2 CDs are 2 in which Fuller plays an 8 bar blues with a 12 bar introduction and (mostly) 12 bar instrumental breaks. The two songs are Untrue Blues and Bye Bye Baby Blues. Untrue Blues is in A, capoed up a fret, and Bye Bye Baby Blues is in G. In both cases, the tune is a standard
| I | V | IV | IV | I | V | I | I |
8 bar blues, but the intro and most of the instrumental breaks are a
| I | I | I | I | IV | IV | I | I | V | IV | I | I |
12 bar blues. Bye Bye Baby Blues does contain one instrumental break in the 8 bar format. It's interesting to note that in this piece Sonny Terry, accompanying on harmonica, follows Fuller perfectly on the verses and on the 12 bar intro and break but seems a little lost on the 8 bar break, as if the 8 bar/12 bar format is how they's played it in practice or previous performance and the 8 bar break was something unusual.
Which leads me to the question: did anyone else, and especially any East Coast artists, play this 8 bar/12 bar format?