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Anneli Drummond-Hay of Great Britain, riding Merely-A-Monarch, competes in the Wills Castella Stakes at the All England Jumping Course in Hickstead, West Sussex on 27th March, 1970. (Photo by Ed Lacey/Popperfoto/Getty Images)

Anneli Drummond-Hay of Great Britain, riding Merely-A-Monarch, competes in the Wills Castella Stakes at the All England Jumping Course in Hickstead, West Sussex on 27th March, 1970. (Photo by Ed Lacey/Popperfoto/Getty Images)