The walls of the north segment of a tower stand on a large angular
block of stone rising from a ledge above the arroyo, or bed of the
canyon, below Ruin 4, on the South Fork. What appears to have been a
doorway opens on its north side; this opening is defended by a wall,
remains of a former protected passageway into the tower.
On the perpendicular cliff of the precipice near Ruin 5 and below
the point on which Ruin 4 stands there are several almost illegible
pictographs, below which are rather obscure evidences of a building,
the features of which can be determined only by excavation.
Instructive features of Tower No. 5 are two parallel walls, one
on each side of the doorway, like those of the circular towers on
the promontory at the junction of the Yellow Jacket and McElmo.
Other towers on the canyon rim show defensive walls, as in Ruin 9,
constructed about their entrances from corners of the buildings to
the mesa rim, effectually preventing passage. Morley and Kidder have
suggested that the walled recess in the cliff below Ruin 9 was probably
built to prevent access from below. This feature is found in the floor
entrances of a building near the Great House of the Holly group.