David,
The book is titled - Bunkers, Pits & Other Hazards - A Guide to the Design, Maintenance & Preservation of Golf's Essential Elements.
The chapter on architects is meant to give some insight and introduction to some of the thoughts these guys had about hazards. No detailed life histories here guys, sorry. Hopefully this chapter will entice those reading it (for example if you are someone who belongs to or works with a course designed by Willie Park or Harry Colt) to seek to learn even more. We only had 350 or so pages (including photos, diagrams, charts,...etc.) to work with for the entire book. The architects chapter is just one of nine.