Reid was not only a critic of the RTM but of the whole “Theory of Ideas” on which it was based.  Thus, he was just as opposed to the representative theory of perception as he was to the RTM.  In contrast to the RTM and to representative theories in general, Reid held to a theory of memory that I'll call the Direct Theory of Memory (the DTM).  On Reid's view, memory is immediate in the same way that perception is immediate.  My, say, seeing the table is immediate if and only if there is no other object O such that it is in virtue of my seeing O that I see the table. The Representative Theory of Perception holds that our perception of the world is always mediated by the perception of our ideas of sense or, in Hume's vocabulary, our impressions. These ideas and impressions, these representations, mediate our knowledge of the world, if knowledge of the world there be.  