| ID: | 10991 |
|---|---|
| Entry Text: | Hiley, Nicholas P. "The Strategic Origins of Room 40." Intell & Nat Sec, 2 (April 1987): 245-73. RN cryptanalytical unit, 1st World War; in old building of Admiralty; earlier, Britain gained control of all cable communications, then, in 1914, cut them to isolate Germany. |