Continued research in Huamachuco since completion of the final draft of this paper amplifies and generally supports the conclusions drawn here. However, in personal communications, both Martha Anders and Patricia Knobloch have pointed out that some of the ceramic material from the mausoleum at Cerro Amaru dates to Middle Horizon 2A. This dating, which we accept, contradicts the statement in this paper that all diagnostic material dates to Middle Horizon 1B, but does solve two problems that arose by limiting the period of Huari-Huamachuco contact to Middle Horizon 1B. The extended period of contact fits well with architectural evidence from Marca Huamachuco that shows two distinct traits (a lintel construction technique and incorporation of organic matter in wall heartings), probably of Huari origin, were borrowed sequentially. The extension also fits well with evidence for continued contact between Huari and Cajamarca during Middle Horizon 2. The ceramics from the mausoleum, of course, have no direct bearing on the dating of the initiation or termination of construction activities at Viracochapampa, and architectural evidence still indicates that construction activities there were probably limited to Middle Horizon 1B.

Other recent developments include support for the idea that the major north-south road existed by the end of the Early Intermediate Period. A Iarge number of settlements of that date are located along the road. We have also confirmed that a small compound built with Huari-style masonry is present in the maize growing area below Marca Huamachuco. It is located in the midst of irregular terraces that might have been irrigated from springs, but the compound was apparently never finished. Thus, this presents no evidence that Huari controlled any significant agricultural production in the area, but does give further evidence of an abrupt break in relations between Huamachuco and Huari. Interestingly, only about 2 km away and in the same agricultural zone there is a small Huamachuco-style "administrative center" associated with a fairly extensive system of well-constructed terraces with spring-fed irrigation. We have conducted only a brief surface investigation of these sites so far. In 1988 we excavated about one-quarter of the possible mausoleum shown in Figure 7; we found no evidence that it was used for human burials nor that it was related to Huari in any way. Finally, excavations at what McCown called the "Cahuadan Round Fort" have shown that it dates to the late Purpucala Phase (ca. A.D. 300) and that its plan consists of large gallery-like buildings arranged around four sides of a trapezoidal patio. This site provides another example of architecture which can be viewed as a precursor to the typical Huari compound.

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