From the beginning, the verse of Mr. Yeats has had vocal quality, a quality that is unfortunately often rarer in good poetry than in verse that is good rhetoric. I cannot see that his interest in the psaltery, that developed after 1900, has brought about any change in the quality of his verse. There have been constant to it since "The Wanderings of Oisin" all the qualities that distinguish it to-day,--its eloquence, its symbols that open up unending vistas through mysteries, its eeriness as of the bewildering light of late sunset over gray-green Irish bog and lake and mountain, its lonely figures as great in their simplicity as those of Homer, its plain statement of high passion that breaks free of all that is occult and surprises with its clarity where so much is dim with dream. First one and then another of these qualities has most interested him. He has written in explanation of patriotic verse, of folk-verse, of verse based on the old court romances, of symbolism, of Rosicrucianism, of essences, of speaking to the psaltery, of dramatic art; and all the time he has practiced poetry, the interest of the time resulting in now the greater emphasis on one quality in the poetry, and now on another quality. It would be superfluous to do more than point out most of these qualities, but a word on his use of symbols may help to a fuller understanding of his poetry. I am very sure that I read wrong meanings from many of these symbols, as one who has not the password must. They require definite knowledge of magical tradition, and of the poet's interpretation of Celtic tradition, for a full understanding. As the years go by, I think their exact meaning will escape more and more readers until they will have no more significance than Spenser's allegories have to us. Only to the student deeply read in Elizabethan politics do these mean to-day what must have been patent to the inner circle at Elizabeth's court. Those symbols of Mr. Yeats that we may understand intuitively, as we may "The white owl in the belfry sits," other generations also may understand, but hardly those that have meanings known only to a coterie. But we may read Spenser with enjoyment even if all the inner allegories are missed, and so, too, many read Mr. Yeats to-day, neglectful of the images of a formal symbolism.