	Cossack reappeared as a five-year-old in the two and a quarter mile Tradesman's Plate at Chester on 2 May. The handicap attracted a field of twenty-nine runners and Cossack was assigned 125 pounds, meaning that he had to concede weight to all but one of his opponents. The race was run at a slow pace and Frank Butler, riding Cossack, found himself trapped behind a "ruck" of horses on the final turn. Butler was forced to pull the horse to the wide outside and Cossack produced a strong finishing run, but failed by a "half neck" to catch Malton, a four-year-old to whom he was conceding thirty-one pounds.