He may be famous for books including The BFG and James and the Giant Peach, but one of Welsh author Roald Dahl's lesser known works could be considered one of his most important.

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When you turn from Ash to the world of Kenneth Koch, you move from a homage-payer to the thing itself Koch, along with James Schuyler, Frank O'Hara, Ashbery and other lesser names, were the very poets who came to be christened the New York school in the 1950s though, according to Ash bery, they shared no programme.

ECONOMIST: New verse