Licks 20a through 20e are meant to be substituted for certain bars of the original, and simpler, Two Timing Cross Blues. Practice each lick separately, then play the entire solo verse.
Notice the use of the "yo" tonal effect in licks 20c and 20d. Review the section on "yo" usage in Progressive Blues Harmonica, if you have not already learned to use this important effect that prepares the beginning harmonica player for the more advanced note bending effects. Note also the use of swing beats, marked as " ." (see pages 9 and 10) in licks 20d and 20e.