In a message dated 98-03-13 19:08:37 EST, you write: << For more on this subject, you can request the paper I've just rewritten on this group. Most of the reasoning is from Glenn and can also be read on Alley's Dodson puzzler page (I'll be out of town for the next week). >> I'd like to have the paper you mention or the URL for Alley's page if I can get it there. Thanks Chuck Demastus