This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.
In A Midsummer Night's Dream, written around 1595, the fairy queen Titania complains that the unnatural weather plaguing the human world has ruined the ordinary pleasures of the countryside, and names among the casualties the nine men's morris boards cut into village greens, now filled with mud and unplayable. The line only works as a complaint if the audience already recognized Nine Men's Morris as an everyday outdoor pastime, marked into turf rather than carved into a portable board, common enough that its absence from a rained out summer was a real and relatable loss.
That single line is worth more to a historian than it looks, because it fixes both a name and a form of play with total confidence at a specific date, in a specific country, for a specific social setting: ordinary English villagers cutting boards into grass rather than owning carved wooden ones. It is exactly the kind of secure anchor point the game's much older stone carvings elsewhere in the world cannot provide on their own.