Letter from a ship's master who wishes to have his name and cert-number changed as a result of having been a prisoner of the Germans in 1914 (signing a declaration that he would not take up arms against the enemy subsequently, solely in order to effect his release). Since then, he has been at sea again as Master of 2 ships, (1 of which was sunk by torpedo), and has destroyed 1 enemy submarine. He now fears that the enemy will have knowledge of him, and requires anonymity until the end of hostilities if he is to continue as a sea-going Master. With acknowledgement from Shipping Intelligence Office [H W K] 31 July 1917