Appendix 1
Photo Credits

Portrait of a wizard, 1977, marker on cardboard by Michael C. Hunt.

Man with hat, 2007, pen and ink by Michael C. Hunt.

Portrait of Henri Poincaré, public domain image courtesy of Wikipedia.com.

Portrait of John Stuart Mill, public domain image courtesy of Wikipedia.com.

Photo of labyrinth at Grace Cathedral copyright Karol Gray, reprinted with permission.

Photo of labyrinth etched in marble copyright Don Joski, reprinted with permission.

Photo of plunge sheep dip copyright 1951 C. Goodwin, reprinted under the terms of Creative Commons Attribution 3.0.

Photo of Mark II engineer’s log courtesy of the U.S. Naval Historical Center.

Screen shot of PocketMod courtesy of Chad Adams, reprinted with permission.

Diagram of affinity grouping copyright Johanna Rothman and Esther Derby, reprinted with permission.

Figure of representational system predicates courtesy of Bobby G. Bodenhamer, at www.neurosemantics.com, reprinted with permission.

Pencil illustrations by the author.

Except as noted, remaining photographs courtesy of iStockPhoto.com.