TIL British actor David McCallum recorded four albums for Capitol Records in the 1960s. Three of the albums were entirely instrumental. One of the instrumental tracks was sampled by Dr. Dre.
Here is his instrumental track The Edge, the one Dre sampled. You'll probably recognize what he sampled almost immediately even if you're only barely aware of his work (like me).
I love how often a sample leads me to listen to something I never would have otherwise. There was a torrent floating around that had all the songs Beastie Boys sampled for Paul's Boutique, it was fantastic.
Thanks! That's a great resource! I enjoy secondhandsongs.com to see who has done cover versions. Sometimes I find out a song I really like isn't even original to the artist I thought it was!