sentences:  The Field Medal voting system was identical to the Liston Trophy voting in all years except 1981, when Division 1 had switched to a two-umpire system but Division 2 was still using a single umpire; in that year, the Field Trophy voting system was unchanged from 1980.As for the Liston Trophy, a countback existed until 1988 to break ties, and retrospective Field Medals were later awarded to players who had lost on this countback.J.