Hi. The only mentions of Be-Careful Wood I can find on the Enid Blyton Society website refer to a picture strip that appeared in The Evening Standard in the early 50s called Mandy, Mops and Cubby, and in a story called Mandy, Mops and Cubby and the Naughty Goblin which appears in Enid Blyton's Big Storytime Book, published by Purnell in 1956.