Rhythmus, or pomp of cadence, or sonorous ascent of clauses, in the structure of sentences, were effects of art as much thrown away upon him as the voice of the charmer upon the deaf adder.
"Biographical Essays"
Thomas de Quincey
Aside from this sonnet, the mockingbird has got into poetical literature, so far as I know, in only one notable instance, and that in the page of a poet where we would least expect to find him,-a bard who habitually bends his ear only to the musical surge and Rhythmus of total nature, and is as little wont to turn aside for any special beauties or points as the most austere of the ancient masters.
"Birds and Poets"
John Burroughs
6. Vom Rhythmus des evangelischen Chorals.
"Johann Sebastian Bach"
Johann Nikolaus Forkel and Charles Sanford Terry