Important early map of the Gold Regions of California, by William Jackson.
William Jackson's map of the gold regions is one of the rarest and most detailed maps of the California Gold Regions, prooduced from on the spot observations during the first year of the California Gold Rush. This second edition of Jackson's map provides a more elaborate and accurate depiction of the Gold Regions, than the first edition of his map, published the preceding year. Rumsey notes:
More ornate and detailed than Jackson's map of 1850, this is the only map to label Santa Cruz county "Branciforte." Shows for the first time, some of the mining activity in the south, which Jackson was involved with as an engineer.
In identifying the map as one of the most the most historically important California maps, Gary Kurutz states
Jackson's map must be regarded as one of the best to cartographically describe the frenzy of the California Gold Rush.... Captain Jackson, a mining engineer who had personally explored the region, delineated the major mining centers of 1849 and the road and trails leading to this auriferous territory.
Streeter wrote that
The Jackson map, which extends from below the Mariposa River on the south to a little above the 39-1/2 parallel on the north, is, I believe, by far the best of the maps of the gold region published to that time. It is on the large scale of about nine miles to the inch, and is skillfully drawn, showing the rivers and roads clearly and indicating a great number of separate mining districts.
Wheat noted that "this excellent early map includes all the important diggings of 1849 and early 1850, and is important in connection with the development of the gold region."
Rubberstamp of Geo. Gordon & Steen in lower margin.