I was thinking last night about the historic name of Alhambra Creek. It used to be called Arroyo Del Hambre and it was Mrs Muir and her mother who suggested the change, I was realizing that I never searched specifically for Arroyo Del Hambre and beaver trapping so I thought you might be interested the historical summary I came across. Apparently in addition to removing all the beavers and otters fur trappers also brought Malaria to the delta which we still appreciate today.
“Two immediate consequences of the activities of the fur trappers were the destruction of populations of fur-bearing mammals, primarily beaver and freshwater otter, and the introduction of malaria, the latter of which would have long-term consequences for the history of the Delta and the Central Valley as a whole”