Garrison Tower

Garrison Tower stands on St Mary’s in the Isles of Scilly, a small granite island off Cornwall’s tip. The structure began life in the 17th century as a windmill, its massive stones still showing the turning gear cut into the walls. By the middle of the 18th century it had fallen out of use and lay in ruins, its sails long silent. In the 1830s the coastguard raised its walls again, turning the hollow shell into a lookout post for spotting ships. A square lantern room was added above, giving clear views across the western approaches. The tower’s next owners gave it a new purpose. In 1869 the Shipping and Mercantile Gazette rented it to watch for vessels and telegraph news of arrivals. Two years later Lloyd’s of London took over the post, using it to gather market-sensitive shipping reports. For decades mariners and merchants relied on the signals flown from its lantern to know which ships had entered the islands. Today the tower is a quiet sentinel at the island’s western edge. Its thick walls and small windows still frame the same horizon that once guided coastguards and Lloyd’s agents. A short climb inside shows the original mill floor now fitted with coastguard fittings. From the lantern platform the sea stretches unbroken to the horizon, the same view that once brought news of every sail.