MEMOIR. XXXVU 



hiiii. This did not, liowever, hinder him from going to the meeting 

 of the British Association for the Advancement of Science held at 

 Leeds in September. Here he read two papers : the first^ " On a 

 fresh form of Crystallization which takes place in the Particles of 

 Fallen Snow under intense Cold/' being one of the subjects of which 

 he had treated at Christiania two years before, and one that another 

 ■winter in the North had enabled him to study more particularly ; 

 and a second, entitled '' Observations on the Arrangement of small 

 Stones on certain bare Levels in Northern Localities " — a curious 

 subject which had attracted his attention during his first visit to the 

 Faeroes in 1849. He was subsequently present as a guest at the 

 Field-meeting of the Tyneside Naturalists' Club, held at Marsden, 

 on the 22nd of October, being the last time he was to attend any 

 scientific assembly. His spirits were somewhat raised by the arrival 

 in the course of the autumn of an enormous collection of eggs 

 received and booked with his accustomed care by old Knoblock at 

 INIunuiovara, and forwarded thence ; but vast as the collection was, 

 it contained no absolute novelty. Wolley's distressing feelings of 

 lassitude continued throughout the winter and following spring ; 

 th(mgh still neither he nor those about him were much alarmed by 

 them. He was pleased by being elected to the Council of the Zoo- 

 logical Society, and as the summer drew on he fancied his bodilv 

 strength in some degree restored ; but at the same time he was aware 

 of an occasional loss of memory, which became now and then very 

 apparent in letters to his friends, causing them some apprehension. 

 Li the month of July an accidental occurrence — seeing his father in 

 danger of being run over by a railway-train — brought on an attack 

 of a very serious character, and he then placed himself under regular 

 medical treatment. No improvement in his symptoms taking place, 

 it was recommended by his old friend Dr. Sibson that further advice 

 should be sought, and accordingly he went to London, where the 

 opinion of Dr. Todd, then one of the highest authorities in the pro- 

 fession, was taken. That gentleman (himself not long after removed 

 by death) at once declared that the case was one in which no hope 

 of recovery could be entertained, that there was an affection of the 

 brain, and that a change for the worse would speedily take place. 

 These fatal words were fulfilled to the letter ; not many days passed 



