The poem is written in prose and consists of 69 lines in 9 unrhymed stanzas. Lines of unrhymed iambic pentameter are commonly known as blank verse. Most of the poem is in unrhymed verse. Finally he began to experiment with leaving most of the lines unrhymed. English-language haiku is an example of an unrhymed tercet poem. Holz went on to experiment with unrhymed styles breaking traditional rules of form. The poem is written in a variation of unrhymed trochaic tetrameter with occasional Pyrrhic substitutions. Two thirds of Browning's poetic works are written in unrhymed pentameters. A Quinzaine is an unrhymed verse of fifteen syllables. The poem is mainly in unrhymed pentameter but includes a section in Rubaiyat quatrain stanzas. The thirty-four line free verse poem consists of eleven unrhymed, unmetered verse paragraphs. Auden also wrote one of the first unrhymed sonnets in English, "The Secret Agent" (1928). Unrhymed verse was never popular, although it was sometimes imitated from Latin. It consists of fourteen unrhymed three-line stanzas (tercets) and a one-line coda. Isbell's translation uses unrhymed couplets that generally alternate between eleven and nine syllables.