|UMTY-IDDY-UMTY: The Story of a Canadian Signaller in the First World War|
|Author||William G. Ogilvie|
|Publisher||Boston Mills Press|
An excellent account of a WW I Signaller in the Artiilery who states that he joined the signal section as flag drill was better than fatigues. The author states that Umty-Iddy-Umty is what they used to refer to morse-code.