There are now several diffuse stellar overdensities (and at least one reported underdensity) in the stellar halo. By consensus, these provide evidence for the build-up of the halo by accretion of smaller objects. I am skeptical, but Rix and I discussed a possible project to analyze the kinematics of one of them—the Hercules-Aquila cloud, which does seem to have a small velocity dispersion.
I continued working on text in the Masjedi paper
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