We know a great deal of the bureaucracy was occupied in overseeing tribute labor for the state, so I suspect a large percentage of the quipu had to do with labor.

an enormous new bureaucracy.

We think those may be the narrative ones,

We suggest that any khipu moving within the state administrative system bearing an initial arrangement of three figure-eight knots would have been immediately recognizable to Inca administrators as an account pertaining to the palace of Puruchuco.

We hypothesize that the arrangement of three figure-eight knots at the start of these khipu represented the place identifier, or toponym, Puruchuco,

For the first time, really, we can see how information that was of interest to the state was moving up and down in a set of interrelated khipu.