Costa Rica's 100-year-old "calypso king," Walter Gavitt Ferguson, used to record his songs live onto blank cassettes, selling each one-off tape without making himself a copy. Now Swiss music fan Niels Werdenberg runs a "tape hunt" to track down the sold tapes — and preserve a beloved piece of Costa Rica's cultural heritage.

The Walter Gavitt Ferguson Tape Hunt website: http://walterferguson-tapehunt.mozello.com/

Buy Don Walter's music: waltergavittferguson.bandcamp.com

Opening theme: "Keepers" by Still Flyin'

Closing theme: "Slow Draw/Feeling In My Heart" by Eric Frisch

Additional music by Blue Dot Sessions

www.forkeepspodcast.com