Billjim, first recorded in 1898, was a term for typical man in the street. I have found an early use of the word through Trove digitised newspapers in the North Queensland Register of 13 March 1899.
The earliest mention of ANZAC I have found in a Trove search is 7 June 1915, when the Adelaide Register and other newspapers reproduced the text of a cable from Major-General Sir Ian Hamilton to the Minister for Defence, Mr Pearce: "I received information from Anzac that enemy reinforcements had been seen advancing from Maidos towards Krithia. Consequently Gen. Birdwood arranged to attack the trenches in front of the Ginn's post at 10 p.m."
In Avoca, the term Anzac was used by the Avoca Mail in December 1915 in an advertisement for the programme of the Navarre annual races:
|Advertisement for Navarre Annual Races appearing in the Avoca Mail of 21 December 1915.|
In November 1915 the Avoca Mail reported on hospitals at Anzac: at that time the term Anzac meant the place, not the soldier. The first reference in the Avoca press to Anzac as a term for a soldier was not until January 1916, in the Avoca Mail.
The word 'Billjim' appears only once in the Avoca Free Press in 1918. I have found no matches for 'Billzac'. Neither term shows up in a search of the Avoca Mail.
The Avoca Mail does not appear to use the term digger for soldier in the issues that have been digitised (all issues for 1915 through to the end of 1918). The term was used by Corporal Bob Harrowfield in a letter published by the Avoca Free Press on 28 September 1918:
We marched (?) leisurely along, and passed thousands of American troops. They are fine lads, very enthusiastic, and gave us a hearty greeting. There, is a very friendly feeling between us, despite chaffing by both sides. The American dislikes "Sammy, '' so we call him "Teddy," and he knows that "Digger" will always do us.