Thanks to Cathryn Carboon who tracked down these documents in Canberra:
“The 18th had moved up to the old front line, and, in accordance with orders, established a new headquarters on Broodseinde Ridge. The pillbox chosen – the only one large enough – lay in view of the Germans, and was also in their new barrage line. At this place Lieut A.V.L. Hull, signalling officer, while sending a message by Lucas lamp, was sniped through the neck. He was pulled into a shell-hole and his wound was dressed. Later, an incendiary shell ignited the camouflage of brushwood and the tinder of the dugout. Lieut A.W. Irvine pulled Lieut. A.T. Doig out of the fire, but Hull, Sergeant R.G. Fountain and 10 others were killed. (Hull belonged to Lockhart, N.S.W.; Irvine to Sydney and Wanaaring, N.S.W.; Doig to North Sydney and Wagga Wagga, N.S.W.: Fountain to Woy Woy, N.S.W.)*
*Excerpt from The A.I.F. in France, The AIF in France: The official history of Australia in the war of 1914-1918 Volume IV by CEW Bean. Passchendaele 1 p. 895