I composed this stanza, at this point, first that, by establishing the climax, I might the better vary and graduate, as regards seriousness and importance, the preceding queries of the lover--and, secondly, that I might definitely settle the rhythm, the meter, and the length and general arrangement of the stanza--as well as graduate the stanzas which were to precede, so that none of them might surpass this in rhythmical effect. Had I been able, in the subsequent composition, to construct more vigorous stanzas, I should, without scruple, have purposely enfeebled them, so as not to interfere with the climacteric effect. And here I may as well say a few words of the versification. My first object (as usual) was originality. The extent to which this has been neglected, in versification, is one of the most unaccountable things in the world. Admitting that there is little possibility of variety in mere _rhythm_, it is still clear that the possible varieties of meter and stanza are absolutely infinite--and yet, _for centuries, no man, in verse, has ever done, or ever seemed to think of doing, an original thing_. The fact is, originality (unless in minds of very unusual force) is by no means a matter, as some suppose, of impulse or intuition. In general, to be found, it must be elaborately sought, and although a positive merit of the highest class, demands in its attainment less of invention than negation. Of course, I pretend to no originality in either the rhythm or meter of the "Raven." The former is trochaic--the latter is octameter acatalectic, alternating with heptameter catalectic repeated in the _refrain_ of the fifth verse, and terminating with tetrameter catalectic. Less pedantically--the feet employed throughout (trochees) consist of a long syllable followed by a short: the first line of the stanza consists of eight of these feet--the second of seven and a half (in effect two-thirds)--the third of eight--the fourth of seven and a half--the fifth the same--the sixth three and a half. Now, each of these lines, taken individually, has been employed before, and what originality the "Raven" has, is in their _combination into stanza_; nothing even remotely approaching this combination has ever been attempted. The effect of this originality of combination is aided by other unusual, and some altogether novel effects, arising from an extension of the application of the principles of rhyme and alliteration. The next point to be considered was the mode of bringing together the lover and the Raven--and the first branch of this consideration was the _locale_. For this the most natural suggestion might seem to be a forest, or the fields--but it has always appeared to me that a close _circumscription of space_ is absolutely necessary to the effect of insulated incident:--it has the force of a frame to a picture. It has an indisputable moral power in keeping concentrated the attention, and, of course, must not be confounded with mere unity of place.