Dean, Brian, and all, thanks for all of the very educational comments. From discussions based on this and other threads, while there were differing opinions, it seems that Parker did not do any original cyanide cc'ing, and that del Grego may have used both bone charcoal and cyanide on certain Parker restorations, raising some question as to the value of those restorations done with cyanide cc'ing.... Does that seem to be a correct assumption from the discussion? Thanks for all of the information you provide.
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