The larger scrap of wood is an offcut from the soundboard. I thought to try my hand at carving a complete Rose; you can see an experimental pattern in one corner.
From time to time I polish the knife blade on a small strop; the edge needs to be razor-sharp for this sort of delicate work – and I keep in mind, too, Dad’s oft-repeated caution: blunt chisels (and knives) are dangerous….