I was just reading a fascinating old Fourth Amendment decision, United States v. Kirschenblatt, 16 F.2d 202 (2d Cir. 1926), and I realized the appeal featured one of my favorite Justices appearing before one of my favorite Judges. John Marshall Harlan II represented the United States as an Assistant U.S. Attorney (back when Emory Buckner was the U.S. Attorney), and the panel decision was by Learned Hand. Cool.
Counsel for the defendant, a Mr. Leo Klugherz, is slightly less known.