The Last Copy of Shakespeare's Psalm at 73

This is one of my favorites. Every image can be read in a twofold way. One for an old person, two for an old book. I think ultimately this poem is about Shakespeare thinking about what happens when his works are all destroyed and there's no evidence of their ever-having existed. And you'll see this immediately when he talks about yellow leaves or not or if you do hang. So that time of year thou missed in me behold when yellow leaves or none or few do hang. Upon those boughs which shake against the cold, their ruined choirs were late, the sweet birds sang. In me thou seest the twilight of such day as after sunset faded in the