The Latest Journey to Roraima. 19 
Roraima. Here some time was occupied in paying off most of the Indians, 
in communicating with Sprostons’ people at Tukeit, and in preparations for 
abandoning the camp, which Dr. Lutz had left, at my direction, about the 
middle of August. Finally I arrived at Georgetown on September 2nd, after 
only eight weeks absence. 
It was an interesting though arduous journey. Looking back upon it fuller 
results might have been secured had the time been longer ; but on the whole it 
has been successful. The Indians were splendidly efficient carriers, while to 
Charles Raggoo, my capable Hindu, a large share of credit is due, for his long 
experience in the bush provided a fund of knowledge upon which I largely drew 
_ in conducting the affairs of the expedition. 
It is difficult to present the biological results of the expedition in a brief form, 
for the material must be studied in great detail, yet some significant facts appear 
with clearness. The survey passed from the forests of the coast to those of 
Roraima itself ; and everywhere, no matter what the altitude might be, 
certain species recurred again and again; other species seemed to be charac- 
teristic of savannahs ofall levels ; still other organisms were restricted to levels 
of a given altitude; and finally each river-system had its peculiar types. 
Combining this analysis with similar studies elsewhere, in time we wil! gain the 
sought-for knowledge of distribution and evolution. 
In conclusion, it is a great pleasure to place on record my sense of gratitude 
to the numerous friends whose assistance and advice were so freely offered. To 
Robert W. Crane, acting American Consul, the largest debt is acknowledged 
for his painstaking study in advance of our arrival of the conditions to be met. 
Mr. C. Wilgress Anderson, I.8.0., F.G.S., F.R.G.S., is also a heavy creditor 
for his expert help, while many more deserve our hearty thanks. To Mr. 
J. J. Nunan special words are due for his appreciation and encouragement 
of our work, and for the high privilege accorded me of presenting an account 
of the journey to the Royal Agricultural and Commercial Society. To one 
and all the foregoing account is tendered as a slight token of a lasting 
appreciation of their interest in what, to us, will always be a memorable 
experience. 
