English: Bay Miwok (or possibly Patwin) shellmound on western end of Bradford Island, Oakley, Contra Costa County, California, USA

Original caption:

Fig. 2.-Illustration of a large sand dune rising about 20 ft. out of the reclaimed tule lands near the western extremity of Bradford Island. This island is encircled by various channels of the San Joaquin River a short distance east of the point where this river joins with the Sacramento, to enter Suisun Bay. Prior to reclamation, the lowlands, which are composed almost entirely of solid peat up to 50 ft. in depth, were continually flooded; but nearly all of these peculiar eminences appear to have been occupied by the aborigines. View looking south.