I have been unable to find the glass industries of this period mentioned by any contemporary author, but I owe to the courtesy of S^{r}. Romero Ortiz some interesting details which have been taken from the archives of certain villages, which although of a more modern date prove that this industry existed in these localities. At about 14 miles from the Puebla de D^{n}. Fadrique, there is a locality called Pinar de la Vidriera, where traces of ovens and scoriæ exist belonging to an ancient glass manufactory, which is likewise mentioned in documents of the municipality as continuing to work in 1620. At Castril de la Peña, a manufactory yet exists where glass is still made, and which has existed from time immemorial in the village. The building itself is decorated with the escutcheon of the family of Hernando de Zafra, one of the secretaries of Queen Isabel, late in the 15th century, who must have purchased it with other lands which he possessed there, towards the year 1492. A gallery, one mile long, which exists at the entrance of the town from whence the sand has been extracted for this manufacture, gives an idea of the antiquity of this industry in this particular locality. It has been calculated that about two tons of sand were used at these glass works every month. At Royo Molino, in the province of Jaen, a very ancient building still exists, now half in ruins, which has been used until very lately as a glass factory. At Maria, in the province of Almeria, several glass manufactories have existed. The oldest, it is believed, was about two miles from the town, and is called traditionally "del Campo," but I have not found mention of it in any document. Three glass ovens existed inside the town: one was established by Vicente Botia, towards the year 1750, which lasted until 1790. Juan Martinez established at about this period an industry of a similar kind near the former one, which continued to work until 1854. The same green glass has been constantly made in these localities, the same forms have been copied, the only difference between the older and more modern specimens consisting in the coarser and heavier quality of the glass. [Illustration: PILGRIMS' GLASS BOTTLE.--SPANISH, 17TH CENTURY.] In treating of the glass manufactures in Spain, where Italian models were imitated to a very great extent, we find very few allusions in contemporary authors of the Middle Ages; it may be because glass vessels were chiefly used with wooden and pottery utensils by the poorer classes, and metal utensils of all kinds by those who were able to afford them. At any rate, it is only towards the end of the Middle Ages that we meet with information concerning this industry, which continues uninterrupted until the present day.