146 Mr. De la Beche on the Geology of Jamaica. 



Flamstead House upon the summit of one of them being 3800 feet above its 

 level. 



To the westward of this range the mountains are of less elevation, Robert- 

 son gives the height of Lunan's Mountain to the north of Spanish Town, as 

 2282 feet. From Stony Hill Barracks, which I make by barometrical mea- 

 surement to be 1360 feet in height, a number of mountains of nearly equal 

 elevation extend into St. Mary's : Green Castle upon the summit of one of 

 them being 1322 feet above the sea. 



The trap mountains of St. John's attain considerable elevation, and are re- 

 markable for sharp ridges intersecting each other in various directions ; the 

 valleys between them becoming suddenly deep, close to their commencement. 



Robertson gives 3140 feet as the height of the Bull Head, an elevated por- 

 tion of the mountain in the north of Clarendon, which may in some measure 

 be considered as a western prolongation of those in St. John's. The range 

 of the Mocho Mountains, also in Clarendon, is separated from the above by 

 the basin drained by the mountain portion of the Rio Minho, and its tributary 

 streams. 



The Mocho Mountains are nearly of the same height as that elevated 

 district, which being divided at the top into many small hills and valleys, has 

 obtained the name of the Manchester Mountains. The Mocho are separated 

 from the latter mountains by a picturesque valley several miles in length called 

 Mile Gully, which gradually falls into the great plain of Vere and Lower 

 Clarendon. 



The greater part of the parish of St. Ann is elevated land, divided into hills 

 and valleys in the manner of Manchester, but on a larger scale : this land at- 

 tains considerable elevation at Monte Diablo, where it towers above the basin 

 of St. Thomas-in-the-Vale. A continuation of the Monte Diablo range ex- 

 tends to the N.E. and separates the two parishes. 



The above is the general character of the principal elevated portions of that 

 part of Jamaica, which it is my present intention to describe. The principal 

 plain is that of Liguanea, with its prolongation through the parishes of St. 

 Catherine and St. Dorothy. The mountains terminate suddenly upon the 

 Liguanea plain, which is inclined, falling gradually from a height of more than 

 700 feet near the Hope Tavern to the sea near Kingston. The plain of 

 St. Catherine, bounded on the south by the Healthshire Hills, with its con- 

 tinuation into St. Dorothy, does not appear to be so much inclined. 



The great plain of Vere and Lower Clarendon is separated from the above 

 by a low range of hills connected with the higher mountains of Clarendon. 

 This district is bounded on the north by the Mocho Mountains, and on the 



