[One] part of the worship of the Horned God was the celebration of fertility in the festival of May Day. These happened in May Fairs held in Greenwich and the area in central London known today as May Fair. In fact, there was once two fairs in Greenwich, on the Monday, Tuesday and Wednesday of both Easter and Whitsun week, with the Easter celebrations being the best known. A time honoured custom at the Greenwich May Day was for young couples to climb the hill to where the Royal Observatory is today, and then run or roll down the hill to the great excitement of the gathered crowds. One wonders how old the effigy of the Horned God in Jack Cade's Cavern under Maidenstone Hill in Greenwich is ? Indeed, whether the ancient cave was ... the site of initiation rites connected with the Horned God.