Girl On The Run, by Hillary Waugh (Pan, 1966). From Ebay.
The Microcosm, by Maureen Duffy (Panther, 1967). From a second-hand
everythingsecondhand:Splash page from Curse Of The Weird No.
The Golden Key, by William O’Farrell (Lancer, 1962). From a
Up A Winding Stair, by H. Vernor Dixon (Gold Medal, 1953). From
The Two-Timers, by Bob Shaw (Ace, 1979). From a charity shop