Telegraph is located in the north west of the island and is the highest point on St Mary's and in the Isles of Scilly, at 51 metres (167 ft) above sea level.

They entered into a contract with Mr. Fenwick of Gateshead (who had been responsible for the first submarine cable between Dover and Calais which was completed on 25 September 1851).

The core of the Scilly cable consisted of three copper wires, insulated by india-rubber, and was manufactured by the Silvertown Company.

On 22 September 1869 the steamer Resolute of Newcastle, arrived at Penzance with the telegraph cable to connect Land’s End to the Isles of Scilly.

[3] On Saturday 25 September 1869 the steamer Fusilier, under Captain Jacques arrived opposite Mill Bay, a small cover about 1.5 miles (2.4 km) south of Land’s End.

[7] The cable was used initially for shipowners and merchants to communicate with their vessels moored in the Islands, and was also used to send weather observations to the mainland.