A scene from Malory, as recast by Tennyson in his 'Idylls of the King' (1859). In the relevant poem, 'Guinevere', the cheerful pointlessness of a May Day procession quickly leads to something less innocent:

For thus it chanced one morn when all the court,

Green-suited, but with plumes that mocked the may,

Had been, their wont, a-maying and returned,

That Modred still in green, all ear and eye,

Climbed to the high top of the garden-wall

To spy some secret scandal if he might,