Letter from Cdr. [H W K] RNR (ret'd) to the Secretary of the Admiralty Concerning the desirability of the adoption of wireless codes for communication between British men of war and merchant ships on the high seas (10 headings); with acknowledgement of the Secretary of the Admiralty dated the following day. Also included is a further letter dated 28 January 1917 from the Secretary of the Admiralty referring to the first item alone, thanking H W K for his suggestions, and explaining that just such codes have been developed and issued to the Mercantile Marine 24 August 1914 - 25 and 28 August 1917