Watch the Sonora Spring: Intro & Chorus online guitar lesson by John Jorgenson from Gypsy Jazz Journeys: Sonora Spring
For the third phrase, we start out by jumping to an open G, very similar to the first phrase, starting with an upstroke on the open G string and move up to C at the 5th fret. This phrase will be outlining a C chord moving to a B7 chord.
After the C, move up to the 7th fret (D), and then down to the B string at the 5th fret for E, then go D-C-D on the G string and back to the E on the B string. Then we're on the B7 chord, playing the third of the chord on the B string at the 4th fret, add a little vibrato and slide down to the open B string. Let's move on to Phase 4.