Rolling gently across the western end of Massachusetts Berkshire County looks east over all of New England and west toward the Hudson River Valley. It is for their beauty in all seasons that these hills and dales and small, welcoming communities are most prized. A world traveler raised in England, Stephen G. Donaldson still sees the Midlands and Cotswolds in his mind's eye when he ventures out of his studio in Great Barrington, Massachusetts, and...