Representatives of the various countries participating in the preparation of the first International Neurological Congress in Berne (1931). Identifiable participants: Max Nonne (front row; second from left), Charles Sherrington (front row; third from left), Bernard Sachs (front row; fourth from left), Robert Bing (back row; second from left), Otto Marburg (back row; third from left); Ottorino Rossi (back row; fourth from left), C.U. Ariëns Kappers (back row; fifth from left), George Guillain (back row; seventh from left) and Henry Alsop Riley (back row, second from right). From Henry Alsop Riley Papers, Archives and Special Collections, Columbia University.