When historians sit down to write the history of the campaign to end rule by administrative agencies one name will loom large — that of a professor of law at Columbia University, Philip Hamburger. He is the visionary who came to see more clearly than others the unconstitutionality of agencies creating ersatz in-house courts. In hindsight it looks like an obvious error, but it took Mr. Hamburger to levy the reform. Congratulations are in order.