I am a chemist by training, but Mormon history has always been open to dilettants (for good and ill). Still, as I ran headlong into the ocean of Mormon historiography, without the mentorship of many I would have been churned and released, to lie recovering on the sand. Without question, the measure that I am able to swim through the vast primary sources and previous works today can mostly be traced back to the kind aid of Justin. I know of no individual with his bibliographic breadth, keen insight and editorial skill.
As he moves on to other endeavors, I wish him well, and thank him.