"He's not quite blue yet, but that will come, you shall see!"
#OTD in 1908.
Maurice Maeterlinck's L'Oiseau bleu is premièred, at Konstantin Stanislavsky's Moscow Art Theatre.
The French composer Albert Wolff wrote an opera (first performed at the New York Metropolitan Opera in 1919) based on Maeterlinck's original play, and Maeterlinck's inamorata Georgette Leblanc produced a novelization.
https://en.wikipedia.org/wiki/The_Blue_Bird_(play)
The Blue Bird at PG:
https://gutenberg.org/ebooks/8606