The core point I would like to convey in a manuscript could be well demonstrated by a dialogue that Piglet and Winnie the Pooh could have had. If I had found a reference where they had such a conversation, I would have quoted and referenced it, but I did not.
What I want to do instead, is write a dialogue myself and add some footnote "A dialogue inspired by the writing of A.A. Milne".
Is this appropriate? Are there any copyright issues that I or the publishing journal should be concerned with?
Winnie the Pooh: Oh, Piglet, my dear friend, I was pondering something quite puzzling today.
Piglet: Oh, dear, what's bothering you, Pooh?
Winnie the Pooh: Well, Piglet, I was wondering if it's appropriate to extend stories, you know, like adding a bit of honey to a favorite tale.
Piglet: Oh, Pooh, do you mean like adding more adventures to the stories we love?
Winnie the Pooh: Exactly, Piglet! But, you see just for the joy of storytelling and sharing.
Piglet: Well, Pooh, I think it could be alright, as long as we respect the original and don't take away from its sweetness.
A dialogue inspired by the writing of A.A. Milne
Edit: I realize now that my original question encapsulates several different questions:
(1) regarding legal implications - according to the reference from @Buffy, it appears the "work is now in the public domain".
(2) appropriateness of using a quote - my intention was to include a brief quote at the beginning of the paper, akin to the example below, but it seems most readers may not appreciate this style.
(3) Writing a dialogue for Winnie the Pooh - the general sentiment was that it would not be easy, but if done well making up a quote is ok. (If you didn't like the example dialogue I put above, I apologize - I asked some generative AI to write my question as a brief conversation between the characters)