The missionaries did not undertake such heavy tasks to attain fame; they did not compare the languages, nor treat them in a scientific way; they tried to reduce them all to the plan of Latin; but they went straight to the practical end of making themselves comprehensible to the natives, and laid firm foundations, upon which might be reared a magnificent structure. The linguistic section of our literature is one of those which most highly honor it, and this, although we know but a portion of it. Countless are the writings which have remained unpublished, either for lack of patronage to supply the cost of printing or because they were translations of sacred texts which it was not permitted to place in vulgar hands. Father Olmos is a notable example of the sad fate which befell many of these writers. It is believed that he knew various Chichimecan dialects, because he was a long time among them, and it is certain that he wrote without counting other books, grammars, and vocabularies of the Aztec, Huastec, and Totonac languages. Of such great works only his Aztec grammar has survived, which, after circulating during more than three centuries through public and private libraries, has finally been saved, thanks to the beautiful edition of it which was published, not in Mexico, but in Paris in 1875. In a history of Mexican literature, notices and analysis of the books on the native languages--today so much esteemed and studied in foreign lands--claim a place of honor. FRANCISCO HERNANDEZ.