Captain William D. MacDougall, United States Naval Attaché in London, to Office of Naval Intelligence
SENT: 13 April, 1917 TO: Navintel No. 14313
The enemy may send a few mine-laying submarines to operate on our own coast. This is probable and is Sims’ opinion.1
Source Note: Cy, DNA, RG 45, Entry 517.
Footnote 1: RAdm. William S. Sims was U.S. Navy’s liaison to the British Admiralty.