Been following Clarke since the mid 60's. He was with the Craig Hunley trio, I think. He was so small (maybe 13?) that the bass was extended in front of him, to to about 3 feet.
Saw the last Return to forever concert in Lexington about 1975. The band came to the after hours place I worked (the Sportsman Lounge) for a late breakfast.
Played a battery powered Alembic bass. Had a 2 hour battery life. He had it rigged with AC power...a big long power chord.
One of the best players (after Ray Brown, of course) ever!
R.