I've heard two stories on the bowed psaltery's origins. One is that it is medieval (the biblical version was plucked)and the other is that it was developed to help Waldorf School students understand music theory better in the 1940's. I had also heard that Barry Dransfield used a bow on one in the '70', thus starting the craze. All the songs mentioned above sound like good Psaltery tunes. I also like to play Lakes of Ponchartrain, Parcel of Rogues, Lagan Love, and Will Ye No Come Back Again. Another big hit in our sets is the Swedish children's hymn Children of the Heavenly Father. I've also done some plucking of a harmony with my thumb to good effect (I know Ivan Stiles uses two bows sometimes as well).