Casa Grande Ruin Thirteenth Annual Report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1891-92, Government Printing Office, Washington — A Reader’s Guide

A Voice of Correction

Mindeleff’s narrative voice is that of a scientific observer intent on precision. He notes that earlier estimates of the ruin’s size ranged from 1,500 square feet to nearly 5 acres—a discrepancy he attributes to differing judgments about which walls belonged to the Casa Grande proper. He does not merely dismiss these earlier accounts; he explains their origin, showing how confusion arose from the ruin’s place within a larger group. His tone is patient but firm, as when he writes that “no accurate plan of the Casa Grande ruin proper has hitherto been made, although plans have been published.” The repetition of “proper” underscores his insistence on delimiting the object of study. This voice of correction shapes the entire report, turning it into a quiet argument for empirical rigor over hearsay.

Construction in Detail

The report’s descriptive sections are dense with technical observation. Mindeleff describes floor construction as “of the ordinary pueblo type,” with primary joists laid across the shorter axis of the room, followed by lighter poles, reeds, and a clay finish. He notes that the joists were “not selected or laid with unusual care,” and that holes in the walls are “seldom in a straight line.” Such details reveal a structure built pragmatically, not monumentally. He also records the imprint of reeds and grass on clay blocks found in the middle room, treating these fragments as evidence of everyday technique. The walls themselves, he explains, were made of a material that when dry is “almost as hard as sandstone and practically indestructible”—yet he carefully distinguishes this from the specially prepared coatings used in other ruins. His attention to material properties and construction sequence gives the report a tactile, almost forensic quality.

The Pace of Decay

Mindeleff’s account of the ruin’s deterioration is notable for its measured pace. He observes that an inhabited structure with such walls “would last indefinitely” with minor repairs after each rainy season, but that abandonment leads to sapping at the ground level. Yet he then notes that in the two centuries since Padre Kino’s visit—when the Casa Grande was already a ruin—there has been “but little destruction.” The real damage, he states flatly, was done by relic hunters in the last twenty years, who tore out lintels and floor joists. This shift in pace—from slow natural decay to sudden human vandalism—gives the narrative a quiet urgency. He reports that as late as twenty years ago a portion of floor or roof was still in place, but now nothing remains except marks on walls and a few stumps of joists “so high that they can not be seen from the ground.” The contrast between centuries of stability and decades of loss is starkly drawn.

Mindeleff’s report rewards readers who attend to its small details: the crooked poles, the double setbacks in walls, the roughness that may mark a bench. His language is never florid, but his observations accumulate into a vivid picture of a structure built by people who knew their materials and a ruin that has survived more from human carelessness than from time. Readers interested in how nineteenth-century ethnographers worked will find here a model of disciplined attention.

That rainy afternoon, I sat with Mindeleff’s measured descriptions of Casa Grande, his patient recording of every wall's thickness. His precision felt like a form of reverence, a slow attention to what remained. Later, half-dreaming, I picked up The Galleries of the Exposition — Reading Notes, and found the same quiet devotion, just turned toward light and space. Architecture and light, both awaiting a steady gaze.