It is important to note that the footnotes contain numerous errors and even contradictions "vis-à-vis" the article text, as can be seen in the text of articles 2.311 and 2.312 and the footnote to the former. Some of these errors are attributable to the codifier, but others are likely due to circumstances beyond his control. There are instances where Vélez Sársfield reworked an entire title or modified a rule without altering the footnotes pertaining to the original edition. In this manner, for example, all the footnotes in Book IV were brought directly from the original drafts by Victorino de la Plaza without any of the pertinent modifications. That said, one should keep in mind that during the editing of "Nueva York" and "La Pampa" many modifications from the original text were accumulated.