Agreda, Manuel, Sculptor, a brother of Esteban Agreda; he superintended the making of biscuit china; born at Haro in 1773; won prizes at the Academy; and was employed at the Manufactory from 1805 to 1808. Bautista, Juan, employed to make porcelain flowers from 1785 to 1808. Bautista, Francisco, appears in 1802 as maker of porcelain flowers. Bautista, Sebastian, appears in 1802 as a maker of porcelain flowers. Chevalier, Pedro, mounter of snuff-boxes from 1759, and continued to work at the Manufactory in 1763. Escalera, Josef, mounter of snuff-boxes from 1781, and continued to work at the Manufactory in 1808. Perche, Jaime Victor, French workman brought from Paris to prepare porcelain, from 1803 to 1809. Vivien, French workman, brought from Paris to prepare porcelain, from 1803 to 1809. At the same time that porcelain was made at Retiro and Alcora, other manufactories of a similar kind were established in Spain; but none of them could compete with these. The most important was established at Sargadelos, Galicia, in 1804. One of the finest specimens which have reached us of this manufactory is a large bas relief representing the massacres of the Spaniards by the French in Madrid on the 2nd of May, 1808. GLASS. Since the South Kensington Museum purchased the largest collection of old and modern Spanish glass in Europe, the taste for and study of this branch of industry has increased to a very great extent. It is evident that this manufacture attained great importance during the three last centuries, and possibly existed at an earlier period; and that glass objects made in Spain possess a special and distinct character, different to those made in other countries. Before the objects at the Kensington Museum were collected, the existence of this industry in Spain was comparatively unknown. The earliest mention of glass works in Spain will be found in Pliny, who, while explaining the proceedings which were employed in this industry, says that glass was made in a similar manner in France and Spain: "Jam vero et per Gallias Hispaniasque simili modo harenae temperantur."--L. XXXVI. cap. 66. The next allusion to this industry will be found in the works of San Isidoro. This eminent man lived in the 7th century, and after quoting the observations of the Roman author, gives us to understand that this industry existed before his time in Italy, France, and Spain: "Olim fiebat et in Italia, et per Gallias, et Hispaniam arena alba mollissima pila mola que terebatur." [Divi. Isid. Hisp. Etymologiarum, I. XVI. cap. 16.] It is evident, therefore, from this passage, that glass was made to a large extent in the Spanish Peninsula during the Roman period. This is confirmed by the number of specimens which are constantly found in ruins. We learn also that the manufacture had ceased to exist in the seventh century.