The Blythes Are Quoted is mentioned in a Winnipeg Free Press article by Morley Walker titled “Book World Slowly Grasping Value of Sequels to Classic Tales,” which is primarily about the publication of a new Winnie-the-Pooh sequel, available today:
Here in Canada, the estate of L.M. Montgomery has got into the act. On Oct. 27, Penguin will release The Blythes Are Quoted, an unabridged version of the stories Montgomery intended as the ninth volume in her Anne of Green Gables series.
Montgomery supposedly submitted the manuscript to her publisher the day she died in 1947 [sic].
She did (supposedly), although she died in 1942.