208 ROCK-SPECIMENS COLLECTED BY DR. HICKS IN ANGLESEY ETC. 
Lydekker supposed to distinguish between the more ancient and 
modern granitoid rocks. But the objection raised did not apply to 
North Wales, where we have no later intrusive granites. He ex- 
pressed his high regard for the work of Sir A. Ramsay; at the same 
time he must nies: against appealing to authority in the discussion 
of questions, when, since statements had been made, new methods 
of investigation had been devised and knowledge greatly increased. 
Dr. Hicks had been attacked generally as well as particularly, and 
he had a right to choose on what issue he would first reply. He 
did not see how the argument of Prof. Seeley bore upon the question 
at issue. 
