illustrated by double tau-shaped figure, [86];
in connection with Toxcatl festival, [97];
in ancient architecture, [120];
in ancient symbolism [130];
typified by shape of irrigating canals of Peru, [132];
on Copan stelæ, [221];
on summits of high mountains, [283];
in China, [286];
by figure of ocelot and eagle combined, [296];