Hi Roy,
I see that you have dug deep into the investment lexicon. Not many folks know John Burr Williams. Parenthetically, you might be interested in a text that CFA Institute co-published with John Wiley that my fellow Content Director, David Larrabee, CFA, and I edited called "Valuation Techniques." In the introduction Gary Brinson comments extensively about John Burr Williams.
Separately, thank you for your answer I will ensure that it enters the discussion today!
With smiles,
Jason A. Voss, CFA