Telegram Communication: Understanding Symbols and Services in 1922 Western Union Messages1921-01-10unknownhttp://rightsstatements.org/vocab/NKC/1.0/enghttp://congressarchives.org/record/CAC_CC_023_3.3_4_10_0008The document provides information on the symbols used to indicate different classes of service for Western Union telegrams, including Telegram, Day Letter, Blue, Night Message, Nite, and Night Letter. If none of these symbols appear, it is considered a telegram. The sender is requesting an update on their case in a message to a representative in Washington, DC.