Earlier the Topanga Culture as depicted by the Tank Site has been characterized as largely constituting a seed-gathering economy. This characterization rests upon the presence of a large number of manos and metates as opposed to the decided rarity of projectile points and the near absence of mammal bone in the site deposit. Some what of a problem is the high ratio of core and flake tools. In American archaeology it has been popular to assume that flaked lithic assemblages automatically imply a hunting and skin-dressing economy. Possibly this assumption represents an Old World hangover with its overemphasis upon faunal associations merely because of their tangible nature as opposed to the lack of preservation of organic plant remains. In the light of all evidence, the situation at the Tank Site strongly suggests the possibility of alternative interpretations up to the point where we might consider a dual usage, or if the data permit, emphasize either a plant or animal economy. During the first season's excavations it was our belief that the area excavated at the Tank Site was, so far as we knew, undisturbed, and any conclusions reached rested upon that basis. It is significant to note that during this season, as a result of our regional survey, we contacted a man named Trujillo, a resident of Topanga Canyon for some sixty years, and from him we gained considerable information pertaining to the Tank Site and the Topanga Culture in general. Mr. Trujillo informed us that it was his practice for some years before 1920 to plant a small hay crop over the area we were presently excavating, and prior to the first planting he had removed numerous oaks and pointed out a now dead, native black walnut that was alive during his earlier days of cultivation. Mr. Trujillo was fully aware that this was an archaeological site and told us he was forced to move many metates and large stones away from the area under cultivation. This action on his part may account in some measure for the somewhat reduced number of large stones in the very upper levels of the site (0 to 8 inches). As the habitation deposit occupies the very top of a knoll, the frequent plowing must have increased surface erosion to some degree. Unknown to us earlier were two springs near the Tank Site which possibly had some bearing on the original selection of this local. It was through Mr. Trujillo that these springs and several additional Topanga Culture sites were found. Mr. Trujillo, in his own way, had come to recognize these metate- and mano-bearing sites to be old and contrasted, as he says, "with the sites down along the creek where the soil is soft and dark with some sea shell and where mortars occur and the burials are all folded up." Such characteristics are typical of sites occurring in the protohistoric and historic period.