Anonymous, Emery and Haydn, Traditional Ed: Slatford . DOUBLE BASS TUTOR. Yorke Mini-Bass Book 1 by Caroline Emery, Rodney Slatford and others. The much-acclaimed book for beginners; aimed at young children from the age of seven, this volume is the product of Caroline Emerys pioneering work as a leading teacher of the Yorke Mini-Bass Project This book contains pieces currently on exam syllabuses: Double Bass AB: 1 - 3 TG: 1 - 3, Init LC: 1 - 2 Pieces are approximately Grade: Beginner - 3 standard.