Sandstorms in Canyon de Chelly 91 Sheep introduced by Spaniards 162 Simpson, J. H., Casa Blanca visited by 104 --, on Navaho expedition 79 Sites, inaccessible, of cliff houses 93, 111, 133, 134, 153, 196 -- of pueblos, how determined 91 Spanish influence in cliff-dwelling masonry 197 -- monks in Canyon de Chelly 191 --, sheep introduced by 162 Stephen, A. M., on Hopi tradition of cliff ruins 191 Steps, absence of, in cliff villages 157 Stevenson, James, Canyon de Chelly visited by 81 Storage cists in cliff ruins discussed 166, 197 -- rooms in cliff village 130, 132 --, _see_ Cist; Granary. Streams in the cliff-ruin region 84 Summer villages of pueblos 92, 156 Symbolism, water, in pueblo pictography 126 Taboo of cliff-ruin timber by Navaho 166 Taos, a many-storied pueblo 155 --, circular kivas at 175 Timber, source of, of the Hopi 166 -- used in cliff-dwelling construction 111, 113, 116, 121, 122, 124, 165, 171, 197 Traditions regarding cliff dwellings 190-191 Trails in Canyon de Chelly 157 Tse-gi, Navaho name of Canyon de Chelly 79, 85 Tse-i-ya-kin, Navaho name of Mummy Cave ruin 112 Tse-on-i-tso-si canyon, location of 85 --, ruin in 101 Tunicha mountains, reference to 84, 85 Tusayan, masonry at 101 --, migration to, of Tewas 196 -- villages, location of, when discovered 91 Vegetation of cliff-ruin region 83