This is why we use room-darkening window shades.  From Loraine and the Little People of Spring by Elizabeth Gordon and illustrated by Ella Dolbear Lee, 1918.

From Cinderella's Mouse by Rosalie K. Fry.

From Queen Nature's Fairy Helpers by Alice Edgerton, 1921.

Where dreams come from.  From Four-and-Forty Fairies by Nathaniel Moore Banta, 1923.

From the apparently very rare Romero and Julietta and Tudor Jenks, 1905.

From The True Story of Humpty Dumpty by Anna Alice Chapin, 1905.

From The Third Golden Rule Book, 1917.

"Presto, the change was made!"  From The Adventures of Nancy and Nick in Scrub-Up-Land by Olive Roberts Barton and illustrated by E. R. Higgins, 1921.

From Homespun Stories by Clara Denton, 1924.

From The Fairy Book by Dinah Maria Mulock Craik, 1913.

Midway through this book, the reader must make a choice: believe in fairies or stop reading and leave the characters to seek their fortunes alone.  From Puck's Broom by E. Gordon Browne and illustrated by Kathleen I. Nixon, 1923.

From The Built Upon House by Janet Field Heath and illustrated by Lloyd J. Dotterer, 1929.

From The Adventures of Nancy and Nick in Scrub-Up-Land by Olive Roberts Barton and illustrated by E. R. Higgins, 1921.

"And don't run round the fairy ring in the wrong direction -- Wid[d]ershins -- the opposte way to the sun.  It is ever so dangerous!  Don't forget this."  From Puck's Broom by E. Gordon Browne and illustrated by Kathleen I. Nixon, 1923.

From the apparently very rare Romero and Julietta and Tudor Jenks, 1905.

"It all came true."  From The Film Daily, 1940.

From Queen Nature's Fairy Helpers by Alice Edgerton, 1921.