Francis Gouton, Domenico Montagnana, Venise 1734 

Ever since I was a child, I have always kept the same volume of Popper's Studies, whose pages look yellow and worn out, pierced by an angry bow, and witness painful moments, (e.g. the thumb of the left hand)… They remind me of such and such teacher. Popper essentially offers a school of the left hand (the positions and the litheness of our left hand) but he always requires a perfect command of the bow