Thank you Chris. I am fond of Adams and White.
Reading his early 5 books back in the late sixties, I remember laughing hard because he expressed his ideas based on his own terrible mistakes. It is like writting to remind oneself what not to do. In some countries of South America we knew it as the "Adams System of Zone Control" (Control de Zonas por el Sistema Adams) and was a highly technical issue fairly translated; a compendium of his tests, proposed charts, chemistry, etc. While flying for the Aerial Photo Group of the Peruvian Air Force, later in the seventies, we use to practice with the 4X5 Speed Graphics (not used for aerials) in our free times trying our best to "mimic" his style with little success. Eventually we will come with something but nothing even close.