All the joints of these hoods, and even the material used, are generally concealed from view by a carefully applied coating of plaster, supplemented by a gypsum wash, and usually there is no visible evidence of the manner in which they are built, but the construction is little superior to that of the simple corner hoods. The method of framing the various types of hoods is illustrated in Fig. 66. The example on the left shows an unplastered wooden hood skeleton. The arrangement of the parts in projecting rectangular stone hoods is illustrated in the right-hand diagram of the figure. In constructing such a chimney a thin buttress is first built against the wall of sufficient width and height to support one side of the hood. The opposite side of the hood is supported by a flat stone, firmly set on edge into the masonry of the wall. The front of the hood is supported by a second flat stone which rests at one end on a rude shoulder in the projecting slab, and at the other end upon the front edge of the buttress. It would be quite practicable for the pueblo builders to form a notch in the lower corner of the supported stone to rest firmly upon a projection of the supporting stone, but in the few cases in which the construction could be observed no such treatment was seen, for they depended mainly on the interlocking of the ragged ends of the stones. This structure serves to support the body of the flue, usually with an intervening stone-covered space forming a shelf. At the present period the flue is usually built of thin sandstone slabs, rudely adjusted to afford mutual support. The whole structure is bound together and smoothed over with mud plastering, and is finally finished with the gypsum wash, applied also to the rest of the room. Mr. A. F. Bandelier describes “a regular chimney, with mantel and shelf, built of stone slabs,” which he found “in the caves of the Rito de los Frijoles, as well as in the cliff dwellings of the regular detached family house type,”[7] which, from the description, must have closely resembled the Zuñi chimney described above. Houses containing such devices may be quite old, but if so they were certainly reoccupied in post-Spanish times. Such dwellings are likely to have been used as places of refuge in times of danger up to a comparatively recent date. [Footnote 7: Fifth Ann. Rept. Arch. Inst. Am., p. 74.] [Illustration: Fig. 66. Unplastered Zuñi chimney hoods, illustrating construction.] Among the many forms of chimneys and fireplaces seen in Tusayan a curious approach to our own arrangement of fireplace and mantel was noticed in a house in Sichumovi. In addition to the principal mantel ledge, a light wooden shelf was arranged against the wall on one side of the flue, one of its ends being supported by an upright piece of wood with a cap, and the other resting on a peg driven into the wall. This fireplace and mantel is illustrated in Fig. 67.