Gabrielle MERMOZ-GILLET (1880-1955) mother of the aviator. 3 L.A.S., Lille May-November 1929, to her parents; 6pages in-4 headed Pharmacie Commerciale de Wazemmes, one letter in pencil. Interesting letters in which she copies Mermoz's letters for her parents. [Gabrielle Mermoz-Gillet was buried with her son's letters]. - May 31, with a copy of a letter from Mermoz from Buenos Aires May 17: he is furious that many letters by plane still arrive by boat, taking a month instead of 7 and a half days. "I have just returned from a second trip to the Argentine Cordillera to organize the landing fields for our Chile line, which I will inaugurate and begin next month [...] The line is going to be tough. More than 6 hours at 6,000 m. altitude each way. [...] It doesn't move me, on the contrary. I'd rather fight and win! Now they call me the French Lindbergh, noblesse oblige"... - 12 [September], with copy of a letter from Mermoz in Buenos Aires August 30: "We had 3 couriers lost in Mauritania, leaving Dakar at the same time and coming from South America"; he leaves for a study trip to Peru, Bolivia and Ecuador... - November 7, with a copy of a letter from Mermoz: "The new Latécoère aircraft I intend to use for my raid has arrived here. I'm continuing to test it, and I'm in charge of launching it and publicizing it in all the major cities of South America"... Enclosed is a fragment of another letter, with a complete copy of one from Mermoz, Argentina, June 7: he is about to set off on an expedition to Chile and Bolivia, and is to organize the line's terrain in Chile. "In the meantime, Latécoère will give me an aircraft to fly non-stop from Toulouse to Buenos Aires, if possible. [...] I will then make a few seaplane crossings from Marseille to Algiers, then attempt the first postal air crossing from Marseille to Rio de Janeiro"...