Motivated by the publication of a letter in which J. Vinson asserted that the text "Eliçara erbiltceco liburua" by Etcheberri was complete, the author introduces another letter in which it is said that the book looks complete although the pages are erroneously numbered. The author wonders, however, if other Basque language copies of the issues dated 1665 and 1666 bear the same mistake