Monica Dickinson, an English jumps trainer and mother of former trainer Michael Dickinson, died Tuesday in England at age 83. Taking over her son's string after he became a flat trainer in 1984, she trained big-race winners Brown's Gazette in the 1984 Christmas Hurdle, Badsworth Boy in the 1985 Queen Mother Champion Chase, and Wayward Lad in the 1985 King George VI Chase.