William Oliver was one of the founders of the California Cap Company. Many photos taken by William and his son Roland are online .  Some of my favorites from this Bancroft Library collection are below.

These four tins predate the San Francisco earthquake. The Lion tin at top is very rare.

A nice illustration of the paper labels used to wrap single tins, and stacks of 5.

Crimpers used to attach caps to fuse.

The old adit with miner and wooden car.

A geologist hard at "work", next to miners cranking a whim.

Mine shaft in Mexico

Riding to work down an incline.

Real miners don't smile.

Mining tourists.