5 
He drew the first map of Nyarling river, A list of plants appears in an 
appendix to his book, prepared by E. A. Preble, his companion on most 
of the journey, and annotated by the author himself. The determinations 
of species are by J. M. Macoun. 
Various parts of the present park area were patrolled by the North- 
west Mounted Police between 1908 and 191 1. Their reports (44) contain 
much valuable information on topography, and on the distribution of the 
major types of vegetation. 
Charles Camsell examined the Salt Plain and upland country between 
Fort Smith and Peace river in the summer of 1916, and wrote a report on 
its topography, geology, and natural resources (20). A collection of the 
principal forage plants, determined by J. M. Macoun, and published with 
the report, appears to be the first authentic material brought from the 
Salt Plains. There are also a few notes upon the success of the Roman 
Catholic Mission Farm, which was located on Salt river about 20 miles from 
Fort Smith. 
The physiographic history of the lowlands of Athabaska, Peace, and 
Slave rivers is well outlined in a paper by E. M. Kindle (33, 34), who was 
for a time engaged in geological survey operations in Mackenzie basin. 
The most comprehensive treatment of the post-Glacial geology of the 
park area is that of A. E. Cameron (8) . In this the principal topographic 
features are outlined, and their origin and development traced to the 
present condition. The paper has been most valuable in a study of the 
distribution of vegetation. F. V. Seibert made a series of journeys in the 
park north of Peace river, and in 1922 published a map containing many 
notes on the vegetation (63) , He also wrote a brief account of the region 
as an appendix to a description of the summer range of the wood buffalo by 
Maxwell Graham (29, 64). 
John Russell, D.L.S., engaged in field work for the Topographical 
Survey, made a small collection of plants in the northern area of the park 
in the summer of 1926. The specimens came chiefly from along Sass, 
Clewi, and Nyarling rivers, and are well annotated as to locality and habitat. 
They were determined by the late Dr. M. 0. Malte, Chief Botanist of the 
National Museum of Canada, and nearly all of them have been examined 
by the writer. This is the only material available from the northern area. 
The activities of the Topographical Survey between 1927 and 1929 have 
yielded an immense amount of information regarding the interior of the 
park. G. H. Blanchet, D.L.S., drew a map, published in blueprint form in 
1927, on which a rough outline of the topography was attempted. Since that 
time most of the southern half of the park has been mapped by aerial 
photography (68). The photographs are particularly useful in mapping the 
vegetation. 
The writer, assisted by his wife, carried on field work in the southern 
part of the park during the summers of 1928-29-30, for the National 
Museum of Canada, and under the general direction of Dr. Malte. Con- 
siderable material gathered in Athabaska-Peace delta, along upper Slave 
river, and in Fort Smith district in the summers of 1926 and 1927 will also 
be incorporated in the present report. The general plan of operations has 
included the systematic collecting of the flora and the making of more or 
less detailed local studies of distribution in certain areas. These areas 
