Official map of Humboldt County compiled and drawn by Stanley Forbes at the scale of 2 miles to 1 inch.

Grid map showing railroad routes from Humboldt Bay to the Sacramento Valley, to accompany a report by M M O'Shaughnessy. (Referred to only, but does not seem to be included in this archive). Drawn at a scale of 3 miles to 1 inch.

Grid map showing the Eureka Slough and Baby Island to the North. It shows various blocks marked as: Weck Addition, Huntoon Addition, Gill Addition, Lentell Addition.

Blueprint map showing relative position of Mountain Mines to principal cities and shippings ports by railroad and water in State of California. The map was drawn by George Sandon, Draughtsman. It contains 3 sections, each drawn at different scales.

Colour map showing the final location of the Iron Mountain Railway, Shasta County, California. The map includes a declaration by M M O'Shaughnessy, Chief Engineer of this railway, certifying its final location and profile. Drawn at a scale of 400 feet to 1 inch.

Blueprint map showing the final location of the Iron Mountain Railway, Shasta County, California. The map includes a declaration by M M O'Shaughnessy, Chief Engineer of this railway, certifying its final location and profile. Drawn at a scale of 400 feet to 1 inch.

Colour, hand-drawn plan of Balaklala Mine, Shasta County. Scale 50 feet to 1 inch. Tunnels and gossan outcrops are marked, with the height of elevations marked in different coloured ink. Part of the drawing shows a section of Balaklala workings.

Grid map showing Sacramento River, and marking the location of Balaklala Mines, Mountain Mines and Keswick Smelting Works.

Blueprint plan of the main dome of the Administration Building. The Architect is Arthur Page Brown. Drawn at a scale of 1/4 inch to 1 foot.

Blueprint plan of the gallery of the Festival Hall. The architect is Arthur Page Brown. Drawn at a scale of 1/8 inch to 1 foot.