Fig. 84 shows the usual type of terraced doorway in Tusayan, in which one jamb is stepped at a considerably greater height than the other. In Tusayan large openings occur in which only one jamb is stepped, producing an effect somewhat of that of the large balcony openings with flights of stone steps at one side, previously illustrated. An opening of this form is shown in Fig. 85. Both of the stepped doorways, illustrated above, are provided with transom openings extending from one roof beam to another. In the absence of a movable door the openings were made of the smallest size consistent with convenient use. The stepped form was very likely suggested by the temporary partial blocking up of an opening with loose, flat stones in such a manner as to least impair its use. This is still quite commonly done, large openings being often seen in which the lower portion on one or both sides is narrowed by means of adobe bricks or stones loosely piled up. In this connection it may be noted that the secondary lintel pole, previously described as occurring in both ancient and modern doorways, serves the additional purpose of a hand-hold when supplies are brought into the house on the backs of the occupants. The stepping of the doorway, while diminishing its exposed area, does not interfere with its use in bringing in large bundles, etc. Series of steps, picked into the faces of the cliffs, and affording access to cliff dwellings, frequently have a supplementary series of narrow and deep cavities that furnish a secure hold for the hands. The requirements of the precipitous environment of these people have led to the carrying of loads of produce, fuel, etc., on the back by means of a suspending band passed across the forehead; this left the hands free to aid in the difficult task of climbing. These conditions seem to have brought about the use, in some cases, of handholds in the marginal frames of interior trapdoors as an aid in climbing the ladder. [Illustration: Fig. 85. A large Tusayan doorway with one notched jamb.]