A Rare Original Hand Written Letter Base Signed by Maharaja Sir Duleep Singh. Undated. Maharaja Sir Duleep Singh, 1838-1893, and later in life nicknamed the "Black Prince of Perthshire", was the last Maharaja of the Sikh Empire. He was Maharaja Ranjit Singh's youngest son, the only child of Maharani Jind Kaur. 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 55mm x 20mm. Condition is average. Mounted on card and age toned.