Black and white lantern slide of a sledge/carriage (carro de bois) being pulled up a hill by a pair of oxen - Visit to Madeira. Part of Box 125 - Madeira. Boswell Collection. ?In 1848 Major Buckley invented the bullock cart (carro de bois), a sled with a canopy and basket chairs, pulled by strong young oxen. The sled runners went more easily over Funchal?s sharp cobbles than did wheels. The bullock carts were banned in the 1980s because they held up traffic.?