Halliday & Matthiessen (1999: 586):
This mind-space may enter into material processes of storing, searching, crossing, escaping etc., either as participant or as circumstance, and also into relational processes of "being + Location". It is interesting to note that in these various lexical metaphors the Sensers are still very much present; they are not effaced. In fact, a number of these lexical metaphors constructed on the model of material clauses retain the option of projecting; see Figure 14-8.
