 According to Curley (1972), Alexander (1974: 168–171), and others, SQs are textures. Alexander also maintains that colors, etc. are not SQs but ideas in minds. But the explicit account of SQs in Essay 2.8.10, repeated in E 2.8.23, 24; 2.21.73, stands against both of these interpretations. Passages that make an analogy between warmth, etc. and pain suggest secondary qualities are subjective sensations (e.g., 2.8.17; also 2.8.21), but Robert Wilson (2015: 199) rightly objects that the sub-species, which includes the sun’s power to melt wax and thereby give it the power to cause ideas of liquidity, shows SQs to be powers to affect bodies as well as minds.