I have read much of the work by Muriel Spark. Her ‘Sparkian’ approach is one that I both love and admire. Recently, I read an account of her life and writings: ‘Like a Cat Loves a Bird’ by James Bailey, in which Muriel Spark’s experience of DEXEDRINE [an amphetamine-based stimulant] is given. Here are some extracts: 
Here are some of the 1950s advertisements for DEXEDRINE:
17 July 1950, Nottingham Journal:
31 August 1984, Ayrshire Post:
Muriel Spark:
