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the divisional lines, those producing the rifts on the faces of rocks sloping abruptly into 

 the sea were found to be either nearly S. or S. by SW. , and dipping easterly. Those 

 producing the slight grooves crossed the others , dipping to the westward , and with a SE. 

 bearing. Another system traversed the faces of the rocks in a horizontal direction. The 

 action of the weather and the tides had deepened many of these fissures , so as to form an 

 irregular system of shallow channels. The rocky shore to the south and west of the Point 

 is, like all the other projecting portions of the coast, the base of a hill- Off its western 

 extremity, (which is separated from the eastern by a small tract of mangrove and is per- 

 haps a distinct hill) there is a large insular rock. The external form of this islet is very 

 plainly due to the divisional planes of the rock. Of these the principal are parallel to its 

 N. and S. or longer sides, bear a very little S. of E. and dip at an angle of about 4S° to 

 the S. Hence while the south edge of the islet has a smooth slope, being formed of the 

 uppermost layer produced by these planes, the northern side on the contrary is steep and 

 rough, presenting a series of broken ledges rising over each other and dipping inwards. The 

 surface of the rock is indistinctly marked by lines at right angles to the principal ones. At 

 the western end, where the remnants of some of the layers stretch into the sea and are 

 broken up by the waves, they are divided by these cross planes into irregular fragments. 

 Other lines are occasionally distinguishable, running NE. by N. The rock is very like 

 those at the adjoining Point, but has a greater tendency to a compact hornblendic charac- 

 ter. The Point is succeeded by a considerable tract of mangrove. 



The next Point is the steep narrow end of a spur covered with jungle save at the sum- 

 mit, from which rises an enormous rock, partially visible through the foliage from the 

 water. With some dimculty I walked and clomb round it through the jungle, and a mi- 

 nute examination on all sides proved that its general external configuration was the result 

 of its internal structure. The northern face, or that which overlooks the channel, is very 

 lofty and picturesque. Its lower portion is of great length, stretching quite across the 

 hill, and rises to a considerable height perpendicularly , or rather with a slight inclination 

 inwards. Above this wallthe rock, as it rises, retires and narrows by successive irregular 

 steps, so as to present a ruined castellated appsarance. The nearly perpendicular wall is the 

 face of the outermost of the layers of which the whole mass is composed. Its direction, 

 agreeing with that of the internal planes of weaker cohesion, is E. SE. nearly, but it is 

 slightly curved. The face is marked by two systems of imperfect grooves crossing each other. 

 One set approaches to vertical but dips some degrees to the W. The other approximates to 

 horizontal, but has a dip of a few degrees to the E. Similar markings are found on the 

 southern face of the mass, and they shew the directions of two systems of divisional planes. 

 The eastern side of the rock dips inward concavely, and probably exposes the true form of 

 one set of the divisional planes. On one side the continuity of its surface is interrupted, 

 and the layers assume a tendency to enwrap nuclei. The west face of the rock dips out- 

 wards, descending by irregular steps. These are formed by two of the systems of divisional 

 planes. They are much broken and in some places traversed by channels of some regularity 

 which are evidently formed in planes of division. All the planes seem to be in some de- 

 gree curved. 



