Harrod enclosed an article on J.L. Austin's Sense and Sensibilia.

"There is only one minor point on which I disagree. You suggest that part of what we believe about physical objects that we perceive is that they are more or less permanent. This is only sometimes true. A flash of lightning lasts for a shorter time than that occupied by the sensation through which we become aware of it. There are many objects of perception which nobody supposes to be in any degree permanent, such as smoke rings, flames, and melting snow flakes. The belief in quasi-permanence which we have about a table is due to experience and does not exist in relation to all sensibilia."