John Blundell has a captivating report (pdf), here is one bit:
When Hayek asked Bartley to do the biography he said: “There are only three things that sell books namely sex, money and violence. As to sex, well, I left my first wife for my first girlfriend. As to money, well, I never had any. And as to violence, let me tell you how I came to bayonet a man to death in World War One!”
For the pointer I thank Yana.