(1693). Sermo mirabilis: Or The silent language. Whereby one may learn prefectly [sic] in the space of six hours, how to impart his mind to any friend in any language, English, French, Dutch, &c. tho never so deep and dangerous a secret, without the least noise, word or voice; and without the knowledge of any in company. Being a wonderful art kept secret for several ages, in Padua, and now only published to the wise and prudent, who will not expose it, as a prostitute, to every foolish, and ignorant fellow. / By Monsieur La Fin, once secretary to his Eminence the Cardinal of Richlieu.

Sermo Mirabilis: Or The Silent Language. Whereby One May Learn Prefectly [sic] in the Space of Six Hours, How to Impart His Mind to Any Friend in Any Language, English, French, Dutch, &c. Tho Never so Deep and Dangerous a Secret, Without the Least Noise, Word or Voice; and Without the Knowledge of Any in Company. Being a Wonderful Art Kept Secret for Several Ages, in Padua, and Now Only Published to the Wise and Prudent, Who Will Not Expose It, as a Prostitute, to Every Foolish, and Ignorant Fellow. / By Monsieur La Fin, Once Secretary to His Eminence the Cardinal of Richlieu. 1693.

Sermo Mirabilis: Or The Silent Language. Whereby One May Learn Prefectly [sic] in the Space of Six Hours, How to Impart His Mind to Any Friend in Any Language, English, French, Dutch, &c. Tho Never so Deep and Dangerous a Secret, Without the Least Noise, Word or Voice; and Without the Knowledge of Any in Company. Being a Wonderful Art Kept Secret for Several Ages, in Padua, and Now Only Published to the Wise and Prudent, Who Will Not Expose It, as a Prostitute, to Every Foolish, and Ignorant Fellow. / By Monsieur La Fin, Once Secretary to His Eminence the Cardinal of Richlieu. 1693.