My reply above was quite short to merely mention a town name. Such was my time availability that evening.
My methodology of books versus internet depends on the data presented in each case. Since there was a very clear beginning of the town name and a state, I pulled the printed July 1913 Postal Guide off the shelf and went to the California town list and found this listing for Knights Ferry:

Thus solved. And by a method fairly similar to Don's simultaneous use of a more extensive town list also in a year close to the candidate postmark.
I did do a quick confirming check with Jim Forte's post office list and found confirming information, but did not have time to make screen shots, etc. As Parcelpostguy notes, Forte's website is hugely valuable .... especially the partial string search feature. Consider it's usefulness when the beginning of the town name is unreadable. What if your cancel had read ".....TS FERRY CAL" The string search would have made quick work of the marking and I would have gone to Forte's site first as the best tool for the problem..