 0\) Subsection "Retrograde transsynaptic labelling of retinal ganglion cells": Some moderation on the Ntsr0 line is still needed. The Zhou et al., (0000) study cited shows fairly clearly only WF-like cells, probably though not certainly Ntsr0, in their Figure 0B but that is a contralateral section (ie. showing the contralateral projection to LP). Additional more superficial cells, which may or may not be WF, appear to be labelled in e.g. Figure 0C after LP injections. I\'ve not strong opinions about whether there are or are not multiple subclasses of SC neurons (including multiple subclasses of WF neurons) but I would argue that we don\'t yet know with certainty.  