Vice Admiral William S. Sims, Commander, United States Naval Forces Operating in European Waters, to the Office of the Chief of Naval Operations
Prepared by A.C. Approved Code No. 8956.
8956 My 7289. Departments cable 4694 noted as this submarine is believed to be U-151.Naval Intelligence has other information concerning Mexican situation. 8956 18203
Source Note: Cy, DNA, RG 45, Entry 517B. The original date was crossed through and a date written above it. The cross-through makes it impossible to determine the first number in the original date. Identifiers in top right-hand corner: “16-15-26” and in columnar fashion: “J/1/5.”