Vice Admiral William S. Sims, Commander, United States Naval Forces Operating in European Waters, Despatch to All Navy Forces in the Atlantic
Copy D. FLOTILLA FLAGSHIP
U.S.S. MELVILLE, 6 June,1918.
Attention called to 76 ALNAV 21st May quote Commanders of all Naval Vessels shall whenever possible take necessary steps to assure themselves of the character of all vessels sighted on the high seas in accordance with international law and usage unquote. 05106.
Source Note: Cy, DNA, RG 45, Entry 517B. It is presumed the document is form Sims as it is addressed from his flagship.