CÉLINE (Louis-Ferdinand). Three autograph letters signed to Pierre Costantini. 1941. 7 pages. On sheets. Pierre Costantini (1889-1986), an aviator in the First World War, was a notorious collaborator and founder of the newspaper "L'Appel". -My dear Costantini 28 May [1941]. One page. Letter concerning the campaign to denounce Charles Trenet's Jewishness "This letter about Trenet is not intended for publication. Of course this jocrite has a thousand alibi papers!" -My dear Costantini [28 November 1941]. Five pages with an envelope. About Charles Péguy: "I would point out to you that Péguy never understood anything, and that he was at once a Dreyfusard, a monarchist and a Calotin. Here are many titles, certainly to the enthusiasm of French youth, so foolish, so enjuivée." -My dear Brother. One page. Correction for an article in "L'Appel". "Would you be so kind as to have Péguy, not cabotin but CALOTIN, restored in the next issue."