The link below is an article from Forbes, printed in 1931 originally. It is long and dense, but it is very very informative of how currency worked when usage of the gold standard was much more common. If you want to know anything about the banking system (generally), this is an excellent read, and very thought provoking.
An interrelationship of gold and other currency, and a primer of banking in general.
...wherever you go, there you are...
- thoughts on the yellow metal