St。Louis，inordertogiveadistasteoftheFrenchjurisprudence，causedthebooksoftheRomanlawtobetranslated；bywhichmeanstheyweremadeknowntothelawyersofthosetimes。Défontaines，whoistheoldestlawwriterwehave，madegreatuseofthoseRomanlaws。[284]Hisworkis，insomemeasure，aresultfromtheancientFrenchjurisprudence，ofthelawsorInstitutionsofSt。Louis，andoftheRomanlaw。Beaumanoirmadeverylittleuseofthelatter；buthereconciledtheancientFrenchlawstotheregulationsofSt。Louis。
Ihaveanotion，therefore，thatthelawbookknownbythenameoftheInstitutionswascompiledbysomebailiffs，withthesamedesignasthatoftheauthorsofthosetwoWorks，andespeciallyofDéfontaines。ThetitleofthisworkmentionsthatitiswrittenaccordingtotheusageofParis，Orleans，andthecourtofBarony；andthepreamblesaysthatittreatsoftheusageofthewholekingdom，ofAnjouandofthecourtofBarony。ItisplainthatthisworkwasmadeforParis，OrleansandAnjou，astheworksofBeaumanoirandDéfontaineswereframedforthecountiesofClermontandVermandois；andasitappearsfromBeaumanoirthatdiverslawsofSt。LouishadbeenreceivedinthecourtsofBarony，thecompilerwasintherighttosaythathisworkrelatedalsotothosecourts。[285]
ItismanifestthatthepersonwhocomposedthisworkcompiledthecustomsofthecountrytogetherwiththelawsandInstitutionsofSt。
Louis。Thisisaveryvaluablework，becauseitcontainstheancientcustomsofAnjou，theInstitutionsofSt。Louis，astheyweretheninuse；and，infine，thewholepracticeoftheancientFrenchlaw。
ThedifferencebetweenthisworkandthoseofDéfontainesandBeaumanoirisitsspeakinginimperativetermsasalegislator；andthismightberight，sinceitwasamedleyofwrittencustomsandlaws。