Walter William Skeat, Chaucer's Works (ed. Skeat) Vol… (1900)
“ Metre. The most interesting point about this poem is that it is the first of the 'third period' of Chaucer's literary work. Here, for the first time, he writes a series of tales, to which he prefixes a prologue; he adopts a new style, in which he seeks to delineate characters; and, at the same time, he introduces a new metre, previously unknown to English writers, but now famous as 'the heroic couplet.' In all these respects, the Legend is evidently the forerunner of the Canterbury Tales, and we see how he was gradually, yet unconsciously, preparing himself for that supreme work. ”
