Barry Cushman, Notre Dame Law School, has published The Clerks of the Four Horsemen (Part II) at 40 J. Sup. Ct. Hist. 55 (2015). Here is the abstract.
This Part II of a two-part article follows the interesting and often surprising lives and careers of the men who clerked for Justices George Sutherland and Pierce Butler. These biographical sketches confound easy stereotypes, and prove the adage that law, like politics, can make for strange bedfellows.Download the article from SSRN at the link.