Admiral William S. Benson, Chief of Naval Operations, to Staff of Vice Admiral William S. Sims, Commander, United States Forces Operating in European Waters
Chronological Copy. File No.
Cablegram Received Jan: 19015 <January 15, 1918.> IT
Origin Opnav Washington Serial No.
[M-4 16?] Jan.
27 ADR VERY SECRET
2213. The U.S.S. AYLWIN is fitted with Fessendan listening device and has on board Mr. Pierce civilian expert on device. It is desired that apparatus be given good test under war conditions and report made._19015.
Source Note: Cy, DNA, RG 45, Entry 517B.