from the Observations of himself and Mr. Clemson, ^3 



In the mean while, during the active search for gold by 

 numerous individuals, discovery was made of the vein de- 

 nounced under the appellation of San Augustin, and which 

 now comprises the four veins of Prosperidad, Santa Isabel, 

 San Augustin, and San Nicolas, The ore of San Augustin is as 

 rich as any in the district, so far as has been examined, vary- 

 ing from 23*30 to 51*60 per cent. 



The denouncements of La Buena Isabela and Perseverancia 

 commenced being mined in 1834. A few English miners 

 were employed in the former in the year 1835, and after prov- 

 ing the vein, the works were suspended on account of some 

 temporary difficulties on the part of the owners. 



Stimulated by the success which attended the mining of the 

 Cobre veins in the vicinity of St. Iago de Cuba, the researches 

 on the north side of the island were continued on a limited scale 

 by a few individuals. During the last two or three years, 

 notwithstanding no mining undertaking had been conducted 

 so far as to bring in a single dollar, great activity was exhi- 

 bited in searching all the savanas through a great range of 

 country. These explorations, however eagerly prosecuted, 

 have up to the present moment led to no other new de- 

 nouncement than that of Savana Veija. Indications and traces 

 have been observed at detached positions, but among these 

 no works, except of the most trivial and superficial nature, 

 have been proceeded with. 



All the denouncements made up to the time we are now 

 writing are comprised within an area of only five miles in 

 length by two in breadth. That of Savana Veija is among 

 the most promising. The principal vein was discovered in 

 1835, but copper had been traced at one or two points on 

 this savana three or four years earlier. There appear to be 

 seven or eight good veins here, which are imperfectly proved. 

 No capital has hitherto been employed in this undertaking ; 

 and in fact this may be said of the entire region, with the ex- 

 ception of the San Fernando and the Good Isabella mines, 

 and even in them it has been expended to a limited extent only. 



Assays of the ores from the various denouncements within 

 this region have been made in abundance, with a view to the 

 ascertainment of their quality. These results, however satis- 

 factory, it is scarcely necessary to communicate in detail here. 



White Limestone of Holguin District, — I add a few addi- 

 tional notes relative to this rock. 



Having examined numerous mountains, hills, and belts of 

 this beautiful rock, and traced their connection with the ad- 

 jacent formations, we were led to the opinion that it is of the 

 same geological age as the serpentines, the greenstones, the 



