TERZA RIMA • DICTIONARY ONE.COM • Definition of Terza rima

... the Hatfield collection, endorsed as 'in Sir Walter's own hand.' The handwriting resembles that of Ralegh in 1603. It comprises altogether 568 verses. Two short poems, of seven and fourteen lines, come first; and the manuscript terminates with an unfinished poem of seven stanzas in a variety of terza rima. The body of the contents consists of 526 elegiac verses, described in the manuscript as 'The twenty-first and last book of the Ocean, to Cynthia.' Archdeacon Hannah, in his Courtly Poets from Ralegh to Montrose, concludes, with some hesitation, ...

— Sir Walter Ralegh - A Biography • William Stebbing