Watch the It's a Major Thing online guitar lesson by Joe Dalton from 50 Acoustic Blues Licks You MUST Know
Here is yet another position. These double stops are using the interval of a third. You get a major sound, especially since we don't use a flatted 7th as part of the basic phrase. Waiting to use the flatted 7th to move into the 4 chord adds to its effectiveness. This lick starts at the 9th fret. This is part of the 7th position E barre chord.