32 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 
dredging expedition to the West of Ireland. In May, 1869, 
accompanied by his wife, he visited the Post-Tertiary deposits in 
the East of Scotland, between Edinburgh and Montrose; and in 
the following month he went with Dr. Brady to the Norfolk 
broads in quest of fresh-water Ostracoda. Equipped with a new 
and improved type of dredge, specially designed by himself for 
work among the fens, he afterwards paid a second visit to the 
East of England. In company with Dr. Brady, he made another 
expedition to the West of Ireland in May, 1871, and later in the 
year he visited Brady at Sunderland. In 1872 he devoted some 
time to the study of the geology of the district round Campbel- 
town Loch, while in July of that year he received at Fern Bank 
a visit from his friend Brady. In June, 1873, he accompanied 
Brady in a dredging excursion to the Scilly Isles. In May, 1874, 
his wife and he went to the Isle of Man to visit Mrs. Robertson’s 
relations, while in the following July he was at work on the east 
coast of England. In this latter expedition, which was under- 
taken under a grant from the British Association, he was accom- 
panied by Dr. Brady and the Rev. A. M. Norman. Later in the 
same year he and Mr. Norman visited the West of Ireland. 
In 1876 the, British Association met at Glasgow. The pros- 
pect of this influx of distinguished visitors had excited consider- 
able activity in local scientific circles, and various publications 
were issued as guides to the natural history and geology of the 
district. Among these was a Catalogue of the Western Scottish 
Fossils, compiled by James Armstrong, John Young, and David 
Robertson, with an introduction by Professor John Young, M.D., 
Glasgow University. In his preface to the volume Professor 
Young remarks that “ Mr. Robertson has supplied a great want 
by his complete list of glacial fossils.” 
His stores of information were also made available in the pre- 
paration of another volume, entitled A Contribution towards a 
Complete Catalogue of the Fauna and Flora of Clydesdale and the 
West of Scotland, which was compiled under the auspices of the 
Glasgow Society of Field Naturalists. In this work the lists of 
Recent Marine Mollusca, Actinozoa, and Foraminifera have Mr. 
Robertson’s name appended to them. Unfortunately, however, 
the catalogue of Marine Mollusca was prepared by a member of 
the Field Naturalists’ Society who had merely noted the localities 
