Beyond the ‘History of Perez del Pulgar,’ Martinez de la Rosa has written several other works in prose, one of which, the latest, entitled ‘Spirit of the Age,’ is in fact, so far as yet published, a History of the French Revolution, preceded by a few general observations on political questions. It has already advanced to six volumes, and becoming a political and philosophical history of contemporaneous events, may be extended to the utmost limits. A novel which he wrote earlier in life, ‘Donna de Solis,’ is acknowledged a failure, as showing “that no man, however eminent, can write successfully on all kinds of subjects.” The principal literary success which Martinez de la Rosa has had, seems to have been as a dramatist; but into those works it would be impossible to enter, to treat them with justice, except by making them a prominent subject of consideration. His poems, published as before stated in 1833, contain compositions in various styles, from the light Anacreontic to the project of an Epic Poem on the Wars of Granada, of which, however, he has only published fragments. Besides a translation of Horace’s ‘Art of Poetry,’ he has also given the world an ‘Ars Poetica,’ for the benefit of his own countrymen, which he has enriched with many excellent notes and criticisms. Some of the rules laid down in this ‘Ars Poetica’ are well worthy of study, as giving room for reflection, for carrying their suggestions even further than he has done. Thus, while insisting on the young poet depending on the excellency of his ear for the melody of verse, instead of having to count the syllables for the requisite purpose, he observes, that as the ancients regulated their metres by time, making so many long or short feet of equivalent measure, of which the judgement must depend on the cadence, so in the verses of the best Spanish poets, there are often some lines containing three or four more syllables than others, to which they form the counterpart, and which are read in the same measure, with increased pleasure for the variation. The same observation may apply to English verse, though perhaps not so fully. Many of our syllables containing shortly sounded vowels, such as a Hebrew scholar might call Sheva and its compounds, pronounced distinctly, but two in the time of an ordinary syllable, may be found to give an elegance to the line, which would sound faulty with only one of them. But we may go further, and observe, that as in music the melody may be continued by the pause, instead of a note in the bar, so in a line, a pause with one or more long syllables may have the effect of a syllable, instead of the sound or foot to make up the measure. Readers of poetry will not require to be reminded of instances of this adaptation of sounds, and if they notice any such lines in these translations, they will perceive that they have been written in accordance with the precepts referred to.