Houseman (Eagle) Creek down-stream along Lightning Creek to the mouth of Ander-
son Creek. These maps were accompanied by a report of the bedrock geology of the
Cariboo region and a description of ali known quartz-vein occurrences.

In 1926 the Geological Survey published Memoir 149, by Johnston and Uglow, with
its accompanying map of the Cariboo area. This geological map, on a scale of 1 mile to
the inch, revised and refined the earlier mapping of Bowman. The Cariboo schists
were described and subdivided into three formations and their areal extent more pre-
cisely mapped. The major anticlinorium of Bowman was retained, numerous north-
easterly trending faults and others were recognized and mapped, the placer-occurrences
along Lightning Creek were described, and much valuable information, obtained from
“old-timers ” living at that time, was published. Hanson’s report on the Willow River
map-area, published in Geological Survey, Canada, Summary Report 19338, Part ie
covers Geological Survey Map Nos. 335A and 336A, Willow River Sheet (East Half and
West Half), but the mapping in the Stanley area is identical with that of Uglow’s
earlier map.

The publication in 1935 of Memoir 181, Hanson’s study of the Barkerville Gold
Belt, made possible a clearer understanding of the structural and stratigraphic localiza-
tion of the quartz veins in the Barkerville Belt. It has served as the basis for more
detailed work in that area and for generalizations of wider application.

Much specific information having to do with various placer and lode operations is
contained in the Annual Reports of the Minister of Mines from 1874 to the present.

PRESENT WORK.

The present report is based on two and one-half months’ field-work in 1945 and
three months’ field-work in 1946. No maps on a suitable scale were available for
plotting on the field scale of 400 feet to the inch. The base map was prepared from
mineral-claim surveys and was plotted by co-ordinates. All surveyed claims are linked
by Lands Branch surveys so that the accuracy of all corner posts is assured. All lines
and posts can be found on the ground, and their positions on the final map are shown,
even though the individual lot surveys may have been cancelled or not recorded. Lots
whose surveys have been cancelled are shown on the map with a “C” after the former
lot number; e.g., L. 104438c.

Map details, including geological observations, creeks, roads and trails, mine-
workings, etc., were located by tape and compass traverses tied in wherever possible to
lot corners close to the lines of traverse. Additional geological information was plotted
from tape traverses run along cut and blazed claim-lines, and from plane-table surveys
around the mine-workings on Burns Mountain and Oregon Gulch.

Tape and compass traverses were plotted on the base map on a scale of 400 feet to
the inch. The resulting plans in turn were compiled on a scale of 1,000 feet to the
inch, preparatory to publication.

It was not found practicable to do sufficient surveying to prepare an accurate and
detailed topographic map. As an alternative, Geological Survey of Canada Map No.
336A was enlarged, and from it the topographic detail was taken to prepare Fig. 1.
The magnetic declination throughout was taken to be 26 degrees 20 minutes east.

ACKNOWLEDGMENTS.

The writer would like to acknowledge the co-operation of the property-owners and
residents in making information available and for releasing for publication valuable
statistical information supplied to the Bureau of Economics and Statistics.

GENERAL CHARACTER OF THE AREA.

The area lies within the Cariboo Mountains, somewhat west of the central axis of
the group. To the west of the area, summit levels are progressively lower until by

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