His ear was capable of such fine distinctions of vowel quality, that it has always been a mystery to me why this gift, so highly developed in him, did not bring a mastery of music in its train. By one of the odd dispensations of nature, Robert Browning, who had none of this fineness of ear, knew enough of music to be able even to read it from a score with his eyes. Such words as "true" and "too," which in most people's mouths have an identical vowel sound, were differentiated by him, the "oo" full and round, the "ue" inclining imperceptibly to "u." His "a" also had far more varied colours than is usual even with singers. One modification in especial, the quality of which can best be described as approaching that of "_Eh_, mon," in broad Scotch, gave a breadth and a dignity to such words as "Nation," "Lamentation," "Pāgeant" (he never used the horrible pronunciation "Padgent"), which added vastly to the musical values of his verse. It is this perfection of vowel balance which makes his poetry so difficult to set to music satisfactorily. So musical is it in itself that very little is left for actual music to supply. It is often the very incompleteness of some poetry which makes it suggestive to a composer, the qualities lacking in the one calling out for the assistance of the other to supply them, a condition of combination which Wagner deliberately carried to a fine art in his double capacity of poet and composer. With Tennyson there is no gap to fill, and all that music can do is to illustrate the surrounding atmosphere, and to leave the poetry to tell its own story with its declamation and inflections accurately preserved.
The best reproduction of the peculiar quality of Tennyson's reading which I have heard was Irving's rendering of the lines about the bird in the last act of "Becket":
We came upon A wild-fowl sitting on her nest, so still, I reach'd my hand and touch'd; she did not stir; The snow had frozen round her, and she sat Stone-dead upon a heap of ice-cold eggs.
The mastery of sound-painting in this line, the chilly "o's" and "e's" which the Poet knew so well how to place, Irving declaimed with a quiet reverence which made the sentence so pathetic that it will always live in the memory of those who heard it. It is interesting to record that all the actors I have met who witnessed the play invariably hit on those lines as the high-water mark of Irving's powers.