
IN MEMORIAM—DAVID ROBERTSON. 31 
assisting her husband in his own favourite departments of research, 
Mrs. Robertson turned her attention to the study of the recent 
Foraminifera, of which she has formed a large and very valuable 
collection. : Dredging excursions off the Cumbraes and along the 
neighbouring shores, as well as visits to more distant localities, 
were frequently carried out by them both. 
In June, 1866, they visited Aberdeen and Banff, with the view 
of examining some of the Post-Glacial deposits in the North-east 
of Scotland. While at Banff they made the acquaintance of 
Thomas Edward, and inspected his collections. Friendly relations 
were ever afterwards maintained between Robertson and Edward, 
and they frequently corresponded with each other. 
Later in the same year Messrs. Crosskey and Robertson were 
offered a free passage to Norway. This offer was accepted, as it 
afforded a favourable opportunity of collecting materials from the 
Norwegian Post-Tertiary beds. They sailed from London in the 
North Star, and Robertson took with him a letter of introduction 
from Dr. Gwyn Jeffreys to Professor Michael Sars, the celebrated 
zoologist. During the voyage from London to Christiania, 
Robertson met with an accident, which resulted in the fracture 
of his lowest rib. As his biographer remarks, “the accident re- 
tarded work at the clays considerably, but by the end of the week 
the invalid was able to be taken out, and when they came to any 
fossil banks, by being laid full length on the ground, he was able 
to pick out the fossils with some care. When he had to be lifted 
up on his feet again the pain was very great. But what is that 
to an enthusiast?” Meanwhile he had written to his wife inform- 
ing her of his accident. Full of anxiety as to the possible conse- 
quences, she at once arranged for a few weeks’ avsence, and 
followed her husband to Norway. Their visit to the “land of the 
midnight sun” was full of interesting experiences, many of which 
have been duly recorded. 
During the next few years the routine of work on the shores 
and in the deeper waters around Cumbrae was often varied by 
excursions to other localities, from all which Mr. Robertson 
brought home abundant trophies of successful research. 
In 1867 he and Mrs. Robertson visited Shetland, for the 
purpose of studying the Entomostraca and Foraminifera of that 
group of isles. In 1868 he accompanied Dr, G. 8. Brady in a 
