It’s now been ten years since Seamus Heaney died, and after a great poet’s death it’s natural, I suppose, that the keg of popular imagination works to distil a lifetime’s writing into a kind of Greatest Hits. His poems ‘Digging’, ‘Blackberry Picking’, ‘Mid-Term Break’ and the masterly sonnet sequence about his mother in ‘Clearances’ sit among the justifiable contenders, but even so there can be concentrations too far.