Canvas Work by William A. McLeod, 1947 - Sails, ditty bags, and many other items were sewn from canvas, and this book focuses on the other items.
The Ditty Bag Book by Frank Rosenow.
The Sailmaker’s Apprentice by Emiliano Marino
Making a Traditional Ditty Bag and Sea Bag, Making a Ships Traditional Canvas Bucket, Two good books by Louie Bartos.
If anyone has suggestions for literature on traditional hand-sewn canvas, please feel free to share them here. This post is in Wiki mode, so just hit that edit button.