[link to original on tumblr]
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This is just the bass part and most of the mellotron parts, so it's a bit empty. I didn't even include the first half of the first verse because there's no bass or mellotron part in it.
Stripping this down to just a few instruments really demonstrates how Rod Argent wrote the parts integrally. During the verses, the bass part is pretty chromatic around the G major scale. It breaks off at F#, but the voices resolve it.