54 NUBIAN SANDSTONE, ETC. SOUTH OF EHAEGA OASIS. [Feb. 1909, 



contrary ; but, on tbe strength of the occurrences in the Libyan 

 Desert, he asked for a reconsideration of the numerous published 

 statements that the granites were never intrusive into the sand- 

 stones. 



With regard to the question of contact-changes, it was because 

 he felt that this required more careful consideration, both in the 

 field and in the laboratory, than he had been able to give to it, that 

 he had not laid greater stress on the point. There were, however, 

 undoubted changes in the sedimentaries in the immediate neigh- 

 bourhood of the granitic bosses, the sandstones being discoloured, 

 indurated, and silicified ; and he believed that the marked changes 

 noticeable in some of the shales might be due to baking. 



Finally, he wished to thank Dr. Teall for referring to his work 

 at Abu Roash, and would like to add that, not only there, but 

 in the Eastern Desert and in the Oases, his detailed work had 

 necessitated entire revision of views at least as firmly held as the 

 one with regard to which he now asked for careful reconsideration. 



