Are you working from Frank Speck's book?
Speck, Frank G. 1914. Double-Curve Motive in Northeastern Algonkian Art. Ottawa: Dept. of Mines, Geological Survey of Canada. 17 p. (Memoir; 42. Anthropological Series; 1).
It is online here:
http://www.civilization.ca/cmc/exhibitions/tresors/ethno/etp1205e.shtml