Oppeln-Bronikowski, F. von.—Wie Maeterlinck arbeitet, Berliner Tageblatt, 19th Feb., 1904.
Oppeln-Bronikowski, F. von.—Die Quellen von Monna Vanna—Nationalzeitung, Sonntagsbeilage 44, 1904.
Oppeln-Bronikowski, F. von.—Maeterlinck's neueste Werke—Nationalzeitung, 19th and 21st July, 1904.
Osgood, H.—Maeterlinck and Emerson—Arena—1896, p. 563.
Pastore, Annibale.—L'Evoluzione di M. Maeterlinck.—Nuova Antologia, 16th March, 1903.
Patrick, M.M.—The Belgian Shakespeare.—Chautauquan (Meadville, Pa.), Oct., 1904.
Phelps, William Lyon—Maeterlinck.—Poet-Lore (Boston), 1899, p. 357.
Phelps, William Lyon.—Maeterlinck and Robert Browning.—Academy, 1903, p. 594. Same: Independent (New York), March 5th, 1903.
Phillips, R.—A Talk with Maurice Maeterlinck.—Book Buyer, New York, July, 1902.