Instrumental Duet Flute,Guitar,Instrumental Duet - Level 3 - Digital Download SKU: A0.575805 Composed by David Warin Solomons. Contemporary. Score and parts. 8 pages. David Warin Solomons #2028307. Published by David Warin Solomons (A0.575805). This is a bittersweet duet for flute and guitar in a jaunty 6/8 time but which continually varies from major to minor. It was originally an ecology song, which I wrote in 1976, but this year I made it into an instrumental piece. Discussions with various flautists finally led to this preferred title (Last picnic at Blue Lake and the French equivalent Dernier Pique-Nique au Lac Bleu) The pdf file contains the score and separate parts. The audio sample is an electronic preview.