It would be useful, interesting and possibly reassuring to see examples of marbles from Akro dirt (or wherever) which match the ones from Alley dirt.
This comparison photo Browndog took was frequently used in the effort to convince everyone that patches found at Sistersville were Alleys:
It would be soooo nice for someone who had the marble resources to show some comparisons of known non-Alleys to go with the patches we see from Sistersville.