In 1946 Gifford published a brief account entitled “Archaeology in the Punta Penasco Region, Sonora” (American Antiquity, Vol. 11, pp. 215-21). Subsequently we both spent considerable time examining sites in the region, upon which we purpose to publish once we have a Carbon 14 date for the prepottery horizon.

In January, 1951, we examined sites in the vicinity of San Felipe, Northern Territory, Baja California, across the Gulf from Punta Peñasco. There we found numerous sites similar in type to those of Sonora. They were situated on dunes and terraces of the desert coast. All were marked by the presence of shells and potsherds. The former were largely of .the species found in Sonora, the latter of undecorated “Yuman” type, both of Mountain and Desert styles as described by A. E. Treganza in his paper entitled “An Archaeological Reconnaissance of Northeastern Baja California and Southeastern California” (American Antiquity, Vol. 8, p. 158, 1942).

In a brief article on the Cape Alitak petroglyphs of Kodiak Island (Heizer, 1947), two incised slate tablets were shown and analyzed with the intent to suggest a relationship in the treatment of the face on the slate pieces and the pecked petroglyphs. The two flat incised slate pieces referred to above came from the Uyak Bay site excavated by A. Hrdlicka in 1931-1938. No similar specimens had been published, and so far as could be determined, they were unique examples of incised art.

Recently Mr. Donald Clark of Kodiak City kindly sent to me for inspection a series of 25 closely similar slate pieces, of which 17 are shown in Fig. 90. They range in thickness from 2 to 6 mm., and are variable in outline. Some are incised on both surfaces, but the majority have the lightly incised lines only on one face. They are made of natural flat slate beach pebbles which can be found all over the island. The pieces shown here are from the vicinity of Kodiak City.