The construction of a bridge linking mainland and island offers a spectacular opportunity to solve the necessary problem of access and to celebrate the landscape that gives rise to it. Our proposal sought to make this link in a way that was simple, durable and reinforces the drama of the place. We made a stone arch of Cornish granite that springs across the chasm, seemingly tethering the island to the mainland. The arched form is made of stones stacked one against the next. Its segmented construction speaks of the compressive force that holds it aloft, and of the masonry castle walls and stone strata of the site. The apex of the arch is just 200mm deep. Its slenderness promotes economy and ease of construction whilst minimising the visual impact of the 70m span on this highly sensitive site. The upper surface of the arch forms a stone path bounded by a handrail of fine bronze balusters, recreating the lost land approach to the castle. The proposal was designed to feel both self-evident and astonishing.