Let's continue with our arrangement of All the things you are. I'm going to introduce a walking bass line at this point. I was debating whether to temporarily stop the arrangement lessons of this tune and do several on guitar walking bass or continue with the arrangement and at a later date do the walking bass lessons. I've opted to continue with the arrangement for the sake of continuity. So I'm going to write out the walking bass part and explain later how to construct one and how it works.
Again there are several ways of combining the three elements (bass/harmony/melody). I'll go from simple to complex.
This first version contains just bass and melody. It lends itself to speed since at any given moment you're only playing two strings or just one if the melody is resting or has a long note value as in the first bar of this tune. It can be used as a nice interlude, solo break, intro, use your imagination.

There is no actual harmony as you can see. It is implied by the relationship between the bass and the melody. Keep the melody sounding for the duration of its notes!
Some of the fingerings are real stretchers but are doable.
Don't force your fingers if they won't stretch, you can end up hurting yourself. It might take some players a little longer to achieve this. That's OK, it took me quite some time.
Here's a good video on how to do this. I'll write out in a post some of the excercises I've used (see the post above this one titled "Left hand finger stretching exercise").
A word on bass lines. Bass is one of the least understood and most important instrumnets in any group. Bass lines create smoothness and a firm foundation on which everyone else in the band builds their creation. If the bass lines are not working the whole band sounds like muck. So, it is
very important to keep the bass sounding for the full length of its value. Avoid short bass notes (in this style) and keep the transition from one to the next as smooth and uniform as possible.
Listen to
Tuck Andress,
Martin Taylor,
Joe Pass, etc..... they are masters at it and it gives the music so much movement.