He appeared personally before successive legislative committees, and in 1846 published a pamphlet, "The Reorganization of the Judiciary," which had its influence in persuading the New York State Constitutional Convention of that year to report in favour of a codification of the laws.
The last great undertaking in which he was employed was the revision of his codification of the canon law, which had been all but completed before the death of Henry.
After the suppression of the insurrection the work of codification was resumed.
The "fuero general" does not profess to supersede the consuetudines antiquorum jurium or Chindaswint's codification of these in the Lex Visigothorum; the "fuero municipal" is really for the most part but a resuscitation of usages formerly established, a recognition and definition of liberties and privileges that had long before been conceded or taken for granted.
The earliest existing codification of the prayerbook is the Siddur (order) drawn up by Amram Gaon of Sura about 850.