[Illustration: PLATE 1 a, BUTTE RUIN]
[Illustration: b, AZTEC SPRING RUIN]
[Illustration: c, SUROUARO, YELLOW JACKET SPRING RUIN
(Photographs by Jacob Wirsula)]
[Illustration: PLATE 2 a, BLANCHARD RUIN]
[Illustration: b, BLANCHARD RUIN, MOUND 2]
[Illustration: c, SUROUARO, YELLOW JACKET SPRING RUIN
(Photographs by Jacob Wirsula)]
[Illustration: PLATE 3 a, ACMEN RUIN
(Photograph by T. G. Lemmon)]
[Illustration: b, MUD SPRING RUIN
(Photograph by Jacob Wirsula)]
[Illustration: PLATE 4 a, BUILDING ON ROCK PINNACLE, NEAR STONE ARCH,
SAND CANYON]
[Illustration: b, STONE ARCH, SAND CANYON
(Photographs by J. Walter Fewkes)]
[Illustration: PLATE 5 a, TOWER IN SAND CANYON]
[Illustration: b, UNIT TYPE HOUSE IN SAND CANYON
(Photographs by T. G. Lemmon)]
[Illustration: PLATE 6 a, STONE ARCH HOUSE, SAND CANYON]
[Illustration: b, CLIFF-HOUSE, SHOWING BROKEN CORNER
(Photographs by Jacob Wirsula)]
[Illustration: PLATE 7 a, SCAFFOLD IN SAND CANYON]
[Illustration: b, STORAGE CIST IN MANCOS VALLEY]
[Illustration: c, PICTOGRAPHS NEAR UNIT TYPE HOUSE IN CAVE
(Photographs by T. G. Lemmon)]
[Illustration: PLATE 8 DOUBLE CLIFF-DWELLING, SAND CANYON
(Photograph by T. G. Lemmon)]
[Illustration: PLATE 9 a, CLIFF-DWELLING UNDER HORSESHOE RUIN]
[Illustration: b, CLIFF-DWELLING, RUIN CANYON
(Photographs by Jacob Wirsula)]
[Illustration: PLATE 10 a, KIVA OF CLIFF RUIN, LOST CANYON]
[Illustration: b, CLIFF RUIN, LOST CANYON
(Photographs by Gordon Parker)]
[Illustration: PLATE 11 a, SQUARE TOWER IN SQUARE TOWER CANYON]
[Illustration: b, TOWER IN McLEAN BASIN]
[Illustration: c, RUIN IN HILL CANYON, UTAH
(Photographs by T. G. Lemmon)]
[Illustration: PLATE 12 HEAD OF SOUTH FORK, SQUARE TOWER CANYON
(Photograph by Geo. L. Beam. Courtesy of the Denver & Rio Grande
Railroad)]
[Illustration: PLATE 13 NORTH FORK OF SQUARE TOWER CANYON, LOOKING WEST
a, Hovenweep Castle. b, Hovenweep House. c, Tower No. 9. d, Tower on
point at junction of North and South Forks. e, Twin Towers. f, Unit
type House
(Photograph by Geo. L. Beam. Courtesy of the Denver & Rio Grande
Railroad)]
[Illustration: PLATE 14 a, HOVENWEEP HOUSE AND HOVENWEEP CASTLE, FROM
THE SOUTH]
[Illustration: b, HOVENWEEP CASTLE, FROM THE WEST]
[Illustration: c, HOVENWEEP CASTLE, FROM THE SOUTH
(Photographs by Jacob Wirsula)]
[Illustration: PLATE 15 a, WEST END OF TWIN TOWER, SHOWING SMALL
CLIFF-HOUSE
(Photograph by J. Walter Fewkes)]
[Illustration: b, TWIN TOWERS, SQUARE TOWER CANYON, FROM THE SOUTH
(Photograph by Jacob Wirsula)]
[Illustration: c, TOWER 4, JUNCTION OF NORTH AND SOUTH FORKS, SQUARE
TOWER CANYON
(Photograph by Jacob Wirsula)]
[Illustration: PLATE 16 a, HOVENWEEP CASTLE, WITH SLEEPING UTE MOUNTAIN,
SOUTH FORK, SQUARE TOWER CANYON]
[Illustration: b, ENTRANCE TO SOUTH FORK, SQUARE TOWER CANYON
(Photographs by Geo. L. Beam. Courtesy of the Denver & Rio Grande
Railroad)]
[Illustration: PLATE 17 STRONGHOLD HOUSE, SQUARE TOWER CANYON
(Photograph by Geo. L. Beam. Courtesy of the Denver & Rio Grande
Railroad)]
[Illustration: PLATE 18 a, HEAD OF HOLLY CANYON]
[Illustration: b, SOUTH SIDE OF HOVENWEEP CASTLE, SQUARE TOWER CANYON
(Photographs by Geo. L. Beam. Courtesy of the Denver & Rio Grande
Railroad)]
[Illustration: PLATE 19 a, HOLLY CANYON GROUP, FROM THE EAST
(Photograph by Jacob Wirsula)]
[Illustration: b, GREAT HOUSE AT HEAD OF HOLLY CANYON, FROM THE NORTH
(Photograph by T. G. Lemmon)]
[Illustration: c, UNIT TYPE RUIN, FROM THE EAST
(Photograph by T. G. Lemmon)]
[Illustration: PLATE 20 a, GREAT HOUSE AT HEAD OF HOLLY CANYON, FROM THE
SOUTH]
[Illustration: b, RUIN B AT HEAD OF HOLLY CANYON, FROM THE WEST]
[Illustration: c, GREAT HOUSE AT HEAD OF HOLLY CANYON
(Photographs by Jacob Wirsula)]
[Illustration: PLATE 21 a, GREAT HOUSE, HOLLY CANYON]
[Illustration: b, STRONGHOLD HOUSE AND TWIN TOWERS, SQUARE TOWER CANYON
(Photographs by Geo. L. Beam. Courtesy of the Denver & Rio Grande
Railroad)]
[Illustration: PLATE 22 a, HOVENWEEP CASTLE]
[Illustration: b, SOUTHERN PART OF CANNONBALL RUIN, McELMO CANYON
(Photographs by T. G. Lemmon)]
[Illustration: PLATE 23 a, SQUARE TOWER WITH ROUNDED CORNERS, HOLLY
CANYON
(Photograph by Jacob Wirsula)]
[Illustration: b, HOLLY TOWER IN HOLLY CANYON
(Photograph by Jacob Wirsula)]
[Illustration: c, HORSESHOE HOUSE
(Photograph by T. G. Lemmon)]
[Illustration: PLATE 24 a, HORSESHOE RUIN
(Photograph by Jacob Wirsula)]
[Illustration: b, BOWLDER CASTLE, ROAD (WICKYUP) CANYON
(Photograph by T. G. Lemmon)]
[Illustration: PLATE 25 a, CLOSED DOORWAY IN BOWLDER CASTLE, ROAD
(WICKYUP) CANYON
(Photograph by J. Walter Fewkes)]
[Illustration: b, BROKEN-DOWN ROUND TOWER, SQUARE TOWER CANYON
(Photograph by Jacob Wirsula)]
[Illustration: PLATE 26 a, NORTH SIDE OF TOWER, SQUARE TOWER CANYON
(Photograph by Jacob Wirsula)]
[Illustration: b, D-SHAPED TOWER NEAR DAVIS RANCH, YELLOW JACKET CANYON
(Photograph by Jacob Wirsula)]
[Illustration: c, MODEL OF TOWERS IN McLEAN BASIN
(Photograph by De Lancey Gill)]
[Illustration: PLATE 27 ROUND TOWER AND D-SHAPED TOWER IN McLEAN BASIN
(Photograph by J. Walter Fewkes)]
[Illustration: PLATE 28 a, D-SHAPED TOWER IN McLEAN BASIN, SHOWING CROSS
SECTION OF WALL]
[Illustration: b, ROUND TOWER IN McLEAN BASIN, SHOWING STANDING STONE
SLAB
(Photographs by J. Walter Fewkes)]
[Illustration: PLATE 29 a, HOLMES TOWER, MANCOS CANYON]
[Illustration: b, LION TOWER, YELLOW JACKET CANYON
(Photographs by T. G. Lemmon)]
[Illustration: PLATE 30 a, TOWER ABOVE CAVATE STOREHOUSES, MANCOS CANYON
BELOW BRIDGE]
[Illustration: b, TOWER ON MESA BETWEEN ERODED CLIFFS AND BRIDGE OVER
MANCOS CANYON ON CORTEZ SHIP-ROCK ROAD
(Photographs by T. G. Lemmon)]
[Illustration: PLATE 31 a, TOWER ABOVE CAVATE STOREHOUSES, MANCOS CANYON
BELOW BRIDGE]
[Illustration: b, ERODED SHALE FORMATION IN WHICH ARE SMALL WALLED
CAVATE STOREHOUSES
(Photographs by T. G. Lemmon)]
[Illustration: PLATE 32 a, RESERVOIR NEAR PICKET CORRAL, SHOWING
RETAINING WALL]
[Illustration: b, KIVA, UNIT TYPE HOUSE, SQUARE TOWER CANYON
(Photographs by T. G. Lemmon)]
[Illustration: PLATE 33 PICTOGRAPHS, YELLOW JACKET CANYON]