Sign language, 60 _et seq._

Signs, examples of, 60, 61, 62, 63, 64.

Sinking into ground, 83.

Siouan, 91, 97, 155.

SIOUX, 25, 44, 49, 60, 66, 67, 69, 138 _et seq._, 150, 151, 155 _et seq._,

224.

_Sipapu_, 171.