Hidden talents

B (our landlady) invited us round to hers for dinner this evening, along with Bob and Cynthia, Sikka and Ralph. That made 3 guitarists: Bob, Ralph and B's partner D -- who also turned out to play a mean blues harmonica. So there was a lengthy after-dinner sobremesa of tunes mostly from the days of our collective youth. Very enjoyable, home at midnight.

PS notice anything odd about the way Bob is playing his guitar?