5. In a late edition of Gury's work, which, I suppose, has not yet fallen under the notice of your correspondent, the error in n. 867 is corrected by the following note: "Invalidatur in genere, dispensatio _si reticetur primus gradus_ ... pro foro interno, expressio propioris gradus non requiritur nisi sit primus". _Editio tertia Germanica_ n. 867, p. 465. 6. Cardinal Gousset undoubtedly followed the view of St. Liguori; but the reference to his work should be t. 2, n. 865, _not_ n. 1136. 7. In conclusion, I may remark that the theory suggested by your correspondent as a possible explanation of St. Liguori's mistake, does not appear to be admissible. The constitution _Etsi Matr._ had reference indeed to a case in which two impediments existed; and the Pope declared that the marriage was invalid, because no mention had been made of the _double_ impediment in the petition for the dispensation. He explained, however, at some length that the invalidity was caused by this defect alone, and that no difficulty would have arisen in case there had been but one impediment--relationship in the third and fourth degrees, although the dispensation had been granted for the fourth without any mention of the third. Amongst other reasons for this decision, he speaks of the common consent of theologians, who agree that in the case of a relationship in the _third_ and _fourth_ degrees, it is not necessary to mention the _gradus propinquior_ when seeking the dispensation. There can be no doubt that it was this passage which induced St. Liguori to conclude that if the gradus propinquior were the _first_ or _second_, it should be expressed in the petition. He could hardly have committed such a mistake as to suppose that _duplex_ impedimentum, meant an impediment of consanguinity in the _second degree_. It is evident that he did not fall into this error, for immediately afterwards, when discussing the question regarding a _duplex impedimentum_ (n. 1138), he adopts the opinion of Benedict XIV. on this subject, quoting the same constitution, _Etsi_, in support of his view. I remain, Reverend Gentlemen, respectfully yours, DUBLINENSIS. May 7th, 1865. DOCUMENTS. DECREE OF THE SACRED CONGREGATION OF PROPAGANDA. I. DECRETUM. _S. Congregationis de Propaganda Fide habitae die 12 Aprilis, 1802._ Quum nomine Archiepiscoporum, Episcoporum, et Vicariorum Apostolicorum M. Britanniae S. Congregationi de Propaganda Fide proposita fuerint tria quaesita, nempe: