Jesus fucking christ. How did they allow this guy - clearly suffering grief from his wife's death - to torture monkeys. I am all about research but this was just cruelty from a broken man.
I will say though, after reading this article, the pit of despair is exactly what it feels like to have severe long term depression.. my brain is the monkey and the pit is the depression.
There's nothing really to be gained in describing the symptoms we all know to exist.
As his colleagues (mostly) cited and criticized during Harlow's time; reproducing or merely describing symptoms is the first baby step in solving the problem.
Not to criticize you, but that's just reality. It'd be like force feeding someone alcohol to study the effects of the mental disease of alcoholism.