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Rh part of whose valuable collection of voyages of discovery to the Northwest Coast, and of material on British Columbia was listed before. On account of the necessary limitation of this checklist to printed material, both of these libraries are inadequately represented in the checklist even now, as the Provincial Library contains the archives of British Columbia, with extremely important Hudson's Bay Company material, and the chief treasures of the Oregon Historical Society's Library are the manuscript journals and letters of early pioneers. The Oregon Historical Society has also some exceedingly valuable pamphlet collections which it seemed impracticable to list by the individual pamphlet and so they are shown only as collections.

The physical appearance of the checklist is quite different from the old edition as it has assumed the dignity of a bound volume and its convenience for use is increased by having half of the page left blank for notes and additions.

In general the plan is much the same as in the earlier edition, though there are some changes in detail. As the preface states "it includes descriptive material relating to the history of the region lying north of California and west of the Rocky Mountains . . . The word history has been used in the broadest sense including a wide range of literature bearing upon the region."

There are certain definite policies of limitation and exclusion which account for what might otherwise be considered serious defects and omissions. It is limited to printed material in the co-operating libraries and therefore cannot be expected to be a complete bibliography of the region. The date Jan. 1, 1920, has been definitely set, beyond which nothing has been included. This makes it necessary to leave out valuable books published or purchased after that time. The geographical area is more carefully defined than in the former edition so that some important items like Taché and Zebulon Pike do not appear. Fewer analyses of long sets are made in this but the