For the first time an urtext edition is available of Giovanni Bottesini's Duetto Fantasia on Bellini's I Puritani. This edition contains a complete authentic edition of this piece, including all the cut material from the original manuscript as a optional performance extra. This edition referenced six different sources, bringing all the information together into one edition. This edition has been made in collaboration with two of the world's leading researchers into Piatti and Bottesini, Adrian Bradbury and Chris West. Within the edition is an Urtext and Critical edition with both the authentic period orchestration and a critical edition for modern day orchestral instruments. This piece is only for bass in solo tuning.