Note 390 — Chapter XVI
Henry Vizetelly translation
Louvois inquired in vain as to the manner in which Fouquet had been able to compound this sympathetic ink. “It is necessary,” he wrote to Saint-Mars on July 26, 1665, “that you should endeavour to find out from Monsieur de Fouquet’s servant how [his master] has written the four lines which appeared upon the book on warming it, and of what he has composed this writing.”