680 THE GEOLOGY OF NORTHERN ANGLESEY. [Aug. 1 899. 



of quartzite does still present considerable difficulties. He could not 

 refrain from saying that the kindly spirit in which Prof. Blake had 

 spoken of the present Author's work deserved their warmest thanks. 



Prof. Lapworth also spoke. 



The Author, in reply to Prof. Blake, stated that he had seen 

 the latter's ' best quartz-knob ' near Parys Mountain, but it was 

 outside the area described. Several masses in Northern Anglesey 

 specifically mentioned by Prof. Blake as ' quartz-knobs ' were dealt 

 with in some detail in the paper, but time had not permitted the 

 evidence to be given that evening. He thanked all the speakers, 

 especially Dr. Hicks, for the very kind way in which they had 

 received his paper. 



