This Fugitive Piece bears within it a real conundrum!
I have been unable to reconcile two types of evidence about a seventeenth-century elite Parisian "prep school" for boys! One cluster of evidence tells how the Seminary of Saint-Sulpice and Curate Alexandre le Ragois de Bretonvilliers (d. 1676) created and funded the school. The other cluster of evidence shows that the school seems to have been created and funded by a lawyer named Nicolas Le Jeune de Franqueville. (Some forty years later, the school ended up as an urban Saint-Cyr for girls.)
I could not resolve the conundrum, so I am making available the evidence I accumulated, in case someone else can unravel the tangled threads that are part of this Fugitive Piece.
The Fugitive Piece is subdivided into sections, each a separate file: