 Complete the following phrase:  After an impressive debut season for the Dons he joined English side Huddersfield Town, then the reigning League Champions, for a record 5000. Jackson helped Huddersfield retain their league title in 192526 and the runners-up spot in the following two years. He also led them to two FA Cup Finals: he scored in the 1928 final against Blackburn Rovers, but it was not enough to prevent a 31 loss. In 