According to this website in the late 1870's/early 1880's, the photographer for MH Grant studios in Eureka, California was Amassa Flaglor.

https://library.humboldt.edu/humco/h...ricsonNews.htm

Here's Flaglor bio:

http://books.google.com/books?id=Nne...page&q&f=false

Seems Flaglor was in Eureka 1871-1880, then moved to San Francisco. Don't find any record of MH Grant studios after 1882 in Eureka. But records are incomplete.