Time As Senser

Halliday & Matthiessen (2014: 250n):

There is one type of ‘mental’ clause of perception where the Senser is a period of time and the Process is either see or find, as in Summer finds campers and hikers descending on the mountains in throngs; Ten minutes later saw us speeding through London. These are metaphorical constructions where a circumstance of Time has been construed as if it were a Senser.