Another find on MathSciNet. Dominique Descotes, Genese des corollaires 1 et 2 de la letter a Carcavy de Blaise PascalGenese des corollaires 1 et 2 de la lettre à Carcavy de Blaise Pascal, MR 99g:01016, review by Craig Fraser: In December of 1658 Blaise Pascal began to publish under the pseudonym A Dettonville the mathematical work Lettres de A Dettonville.... According to C B Boyer, "the name Amos Dettonville was an anagram of Louis de Montalte, the pseudonym used [by Pascal] in the Lettres provinciales."