Blonde Genius

Benkinsop's Academy for the Daughters of Gentlefolk prided itself that any girl coming from its hallowed portals was a valuable and talented member of society-underground society that is. For although the Prospectus included Wise Shopping, Household Hints and Folk Dancing classes, had you investigated behind the basement doors and red warning lights, you would have found girls practising the gentle arts of shoplifting, safe-cracking and striptease.
But the Academy was in deadly peril from a rival organisation. As the Champion of the Lower Grebe Approved School for girls held the drugged Head Girl of Benkinsop's in a stranglehold during the Inter-Schools "Debate", a member of the Mediterranean Syndicate was lifting the contents of the Head's safe containing ancestral diamonds and £10, 000 "Petty Cash" ...