How did the pre-computer players outside the Soviet Union get good?
You occasionally run into snippets in chess history books or articles about how a particular Western player from the pre-computer era improved early in their careers -- Bobby Fischer obsessively playing at chess clubs and in the park, Staunton playing hundreds of games with John Cochrane, William Fairhurst reading a bunch of chess books from Tarrasch and others -- but nothing like the massive amount of improvement advice that you see today. The Soviet system seems pretty well documented, but the way players learned and improved in the West you hear a bit less about.
Are there any good sources that describe how the top players outside the Soviet Union and from the pre-computer era trained and improved? Were there any common pathways to improvement? #games