I don't remember Peter saying so, in the Secret Seven books-- but Fatty says that even Sherlock Holmes cannot solve the mystery-- in one of the Find -outers books
It's 'Secret seven win through'' -- I think-- because there they have a new meeting place in a cave. A mysterious person goes in and out even helping himself to the choclates etc. the Seven have kept-- But I still can't fathom out when Peter said about Sherlock Holmes--- and I don't ever forget Enid Blyton's words-- I must read the book again though I have read it ever so often-- I must be getting a forgettry-- Thanks for the hint.
I give up-- I just can't recollect-- I thought it must be Three cheers Secret seven-- they have a new meeting place in a tree house , and a boy hides in their tree house-- is that the one? By the way- ''forgettery '' is a word that Goon says in one of the findouters books-- I liked the word so much that I use it now. So hats off to Enid Blyton as usual.