 This seems strange enough in itself, a curious coincidence.In reality, he had much greater luck; among the documents and papers obtained by Fanny Rossi, the widow of Giacomo Stradivari (1822-1901), Bisiach found the most precious and extraordinary item imaginable, that is, the formula for the varnish of the great Antonio Stradivarius from 1704.In truth, it was not the only varnish of the eighteenth century that Bisiach could use.