 He interviewed Bertrand Russell, who had discovered the famous "Russell's paradox" in Frege’s logical foundation for arithmetic; and he also interviewed Rudolf Carnap, who had been a student of Frege's.Of special importance was a meeting that Bynum had with Ignacio Angelelli, who recently had visited Jena University in Germany where Frege spent his entire academic career.While in Jena, Angelelli had secured a photograph of Frege and a wealth of materials about Frege’s career and personal life.