In addition to his Championship entries, Crossley also took part in a number of non-Championship races in the Alta, but at the end of the 1950 season he decided to retire due to the high costs of the sport.
Ademais das súas entradas no Campionato, Crossley tamén participou nunha serie de carreiras fora de campionato no Alta, pero ao final da tempada de 1950 decidiu retirarse debido aos altos custos do deporte.