The River of Beaching is a solemn poetic form concerning the concept of nature, originating in The Ultra-Thorns of Justifying. The rules of the form are applied by poets to produce individual poems which can be recited. The poem is a series of quatrains. Use of epenthesis and ambiguity is characteristic of the form. Forms of parallelism are common throughout the poem, in that certain lines sometimes have reversed word orders and they reverse grammatical structures. Each line has eleven syllables.