"However, we have every confidence in the Enid Blyton Society's views, " Chorion's Esra Cafer said.
The typescript was part of a bundle of Blyton treasures bought by Seven Stories last year.
After writing, Blyton would normally scrutinise her manuscripts in fine detail, changing certain words here and there.
The collection of original typescripts was auctioned following the death of Blyton's eldest daughter, Gillian Baverstock, in 2007.
The typescript is not dated but bears the address Old Thatch, Bourne End, Buckinghamshire - Blyton's home until 1938.
Summerfield has seen the contents page and the first page of the story, as has Blyton's daughter Imogen Smallwood.
Blyton, who wrote more than 700 books and died in 1968, was the best-selling English-language author of the 20th Century.
Mrs Dorme, a former librarian, said Enid Blyton had been writing 60 years ago with the attitudes and thinking of her time.
Blyton, who died in 1968, was the 20th century's most successful children's writer, selling more than 400 million books, half of those Noddy titles.
British company Absolute Studios has created an electronic Toyland and computerised versions of Enid Blyton's characters, which have been loved by children for decades.
Chorion, the company that controls Blyton's estate, consulted Summerfield and said it thought the script had been rejected by publishers and subsequently forgotten about.
United States television companies grabbed the chance to show a series based on Enid Blyton's creation which has been specially tailored for the American market.
Last year the centre set up an Enid Blyton archive after buying original typescripts of some of her best-known work including the Secret Seven series.
Enid Blyton is a registered trade mark of Chorion Rights Limited.
"To my mind, they've nothing in common at all because they're completely different vehicles, " says Tony Summerfield, head of the Enid Blyton Society and a leading expert on the author.
And he said Kastner celebrated that theme and also what children could do by themselves, an idea that had been picked up by writers such as Enid Blyton, Anthony Horowitz and Charlie Higson.
Chorion, the company that controls Blyton's estate, said it could not be 100% sure about the differences between the picture book and the novel because they both "pre-date our acquisition of the Blyton Estate".
David Rudd, professor of children's literature at the University of Bolton and an expert on the author, said Enid Blyton's stories had been seen as racist since the late 1960s, with the idea gathering momentum in the 1970s and 80s.
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