A Rare Original Hand Written Letter Base Signed by Royal Navel Surveyor Henry Charles Otter. Undated. Henry Charles Otter 1807-1876 was a Royal Navy officer and hydrographic surveyor, noted for his work in charting Scotland in the mid-19th century. He was active in surveying in the Baltic Sea during the war with Russia (1853-6) and in supporting the laying of the first transatlantic telegraph cable in 1858. From a autograph book kept by A. P. Watt (1834-1914), founder of A. P. Watt & Son in 1875, the world's first literary agents. Size is 85mm x 35mm. Condition is average. Mounted on card and age toned.