The source for this 6 Sonatas is the manuscript available on IMSLP, which has no data: cross-checking booklets from the recordings by Javier Perianes for Harmonia Mundi and by Pedro Casals for Naxos, it’s most likely a first edition printed in 1780 in Madrid, currently preserved in the Library of Congress in Washington DC. The manuscript has a great amount of ink stains, which made the reading sometimes difficult, but without totally compromising it. The greatest issue was due a bad scanning of the manuscript, cutting the upper part of pp. 12 and 21 and the lower part of p. 29 (page numbers referring to IMSLP PDF file). The first instance on page 12 (Allegro from Sonata No.2) affected only to the upper staff of a passage which clearly returns identical in the following system, and so was easily fixed; the other two cuts involved the loss of an entire system, in the Adagios from Sonata IV (beginning) and V (ending): a reconstruction is therefore proposed in brackets and smaller notation, based on reproposition of the same material in different keys during the rest of those movements. No other relevant editorial choices were made, except for minor adjustments in articulations coherence (slurs, appoggiaturas etc.)