In Chapter 6, “Theory of Archaeological Excavation,” I localize my ethnographic narrative from the wider landscape of the excavation site into the narrow confines of the trench—the archaeological laboratory. I shift my focus from the epistemic landscape to the epistemic square. Through an ethnography of micro-practices, I describe the process by which material culture in the trench-laboratory is recognized, discovered, and transformed into archaeological evidence. The theoretical framework of this practice is the concept of stratigraphy—the geological principle through which archaeological materiality is chronologically dated. I argue that the systematic scientific process in the micro-context of the trench-laboratory that produces material evidence for the construction of the narrative of the past is a practice dependent on a non-objective idea of time and space.