Ascher Databook Notes:
1. This is one of several khipus acquired by the Museum in 1907 with provenance Ica. For a list of them, see AS100.
2. Some values on the khipu are sums of values on later consecutive pendants. Namely:

P1 = P3 + P4
P4 = P5 + P6
P6 = P9 + P10 + P11
P7 = P8 + P9 + P10 + P11

One value is the sum of the squares of values on later consecutive pendants:
$P_{2} = \sum\limits_{i=4}^{11} P_{i}^2$