“W. S. Merwin won his second Pulitzer Prize for poetry on Monday for ‘The Shadow of Sirius,’ a collection that the Pulitzer board described in its citation as ‘luminous’ and ‘often tender’ — and that Merwin called a happy accident. … ‘If people are honest, very few gardens are exactly the way they were planned, if they were ever planned. They evolve, just like children grow up.'”