Examples of sense-objects are a particular sort of colour, say Cambridge blue, or a particular sort of sound, or a particular sort of smell, or a particular sort of feeling.

I am not talking of a particular patch of blue as seen during a particular second of time at a definite date.

Such a patch is an event where Cambridge blue is situated.
Similarly I am not talking of any particular concert-room as filled with the note.

I mean the note itself and not the patch of volume filled by the sound for a tenth of a second.

It is natural for us to think of the note in itself, but in the case of colour we are apt to think of it merely as a property of the patch.