 It was followed by "De sacramentis in genere"; "De Venerabili Eucharistiæ Sacramento et de sacrosancto Missæ sacrificio" (Lyons, 1636); "De Virtute et Sacramento poenitentiæ, de Suffragiis et Indulgentiis" (Lyons, 1638); and "De justitia et jure" (Lyon, 1642), the work on which de Lugo's fame especially rested.In composition of this important treatise, he was greatly aided by his knowledge of law acquired in his younger days at Salamanca, and it was this work which he dedicated and presented to the pope in person and which may be said to have gained for him a cardinal's hat.De Lugo wrote to other works