1. IOR/L/MIL/7/10223 Reference (shelfmark): IOR/L/MIL/7/10223 Title: Collection 238A/7 Intercommunication by wireless telegraph between naval and military services; sliding alphabet cipher; wavelengths in use at Indian defended ports. Collection Area: India Office Records and Private Papers Languages: English Date Range: 1910-1926 Extent: 1 file