Wikipedia also covers a 1960 sequel "with Storr focusing on the trials of growing up rather than magical happenings, although there is arguably a fantastic subtext in Marianne and Mark". Marianne is 10 years old at the end of Marianne Dreams, 15 at the beginning of the sequel.
Even under its common title, this novel is sometimes called The Magic Drawing Pencil (series) #1; for instance at Amazon and Goodreads.
1st ed.
Price from review by {{a|Naomi Lewis}} The Guardian 1958-11-23 pA10 "Children's Books: Magic, Myths and Poetry" (earliest notice found in newspapers), and multiple December items.
Wikipedia provides a front cover image of the 1st ed., reported, whose illustration is by interior illustrator Watts evidently.
