Sir Gawayn and the Green Knight; Patience; Pearl; and purity, all these four poems are contained in one anonymous manuscript about, 1370.
They are in the remote Lancashire (Northern) dialect and the vocabulary is outdated. Hence the poems are difficult to follow for the modern reader. They are all in the alliterative measure which is rigidly followed. But their artistic merit is great. All the four poems are in praise of chastity. They are all moral allegories, except Sir Gawayn and the Green Knight which is romance.