Sonnet 18 this sonnet: it is not the actual young man who will be eternalized, but the description of him contained in the poem, and the poem contains scant or no description of the young man, but instead contains vivid and lasting descriptions of a summer day; which the young man is supposed to outlive. Sonnet 18 is a typical English or Shakespearean sonnet, having 14 lines of iambic pentameter: three quatrains followed by a couplet. It also has the characteristic rhyme scheme: "abab cdcd efef gg". The poem reflects the rhetorical tradition of an Italian or Petrarchan Sonnet. Petrarchan sonnets typically
Caudate sonnet is one of many in which Hopkins experimented with variations on sonnet form. However, unlike the curtal sonnet, a Hopkins invention which is a 10½-line form with precisely the same proportions as a Petrarchan sonnet, his caudate sonnet is a full sonnet unmodified but with an extra six lines. Hopkins heightens the effect of the extension with an enjambment from the 14th line to the 15th. Hopkins explored the possibility of such a coda in a series of letters exchanged with Robert Bridges, from whom he learned of the centrality of Milton's example in the form. Though the intent of