Ironically this photo and a number of others just recently came out of Isaac Minor's house in Glendale. The collection was most likely his, and still remains in the family. I was lucky to have the chance to scan dozens of photos.

The following information on this photo and Minor Mill was obtained from the 4L group on Yahoo ( http://groups.yahoo.com/group/4L/ )

The photo shows Minor Mill & Lbr. Co. #2 built by Globe Iron Works of San Francisco in 1884 and scrapped in 1942. See Steam in the Redwoods by Carranco & Sorensen.

Isaac Minor built the Warren Creek Railroad in 1882 to reach
timber and a rock quarry. The line branched off the Arcata & Mad
River RR near its Warren Creek bridge and used the same 45.25 inch
track gauge. The loco in the photo is No.2, an 0-4-0t built by Globe
of San Francisco in 1884. In 1885, Minor built a new sawmill at
Glendale on A&MR and the Warren Creek logs went there. Loco lasted
until 1942. Glendale was the site where Timber Heritage stored its
collection until the recent move to Samoa.