Next of kin plaque : Private William John Monaghan (Sullivan), 1st Light Horse Regiment, AIF

Bronze next of kin plaque, showing on the obverse, Britannia holding a laurel wreath, the British lion, dolphins, a spray of oak leaves and the words 'HE DIED FOR FREEDOM AND HONOUR' around the edge. Beneath the main figures, the British lion defeats the German eagle. The initials 'ECP', for the designer Edward Carter Preston appear above the lion's right forepaw. A raised rectangle above the lion's head bears the name 'WILLIAM JOHN MONAGHAN'.

Born near Colac, New South Wales, William John Sullivan was employed as a bank clerk when he enlisted in the AIF in Sydney on 28 August 1914, using the surname Monaghan, his mother's maiden name. He had previously served in the citizen forces in the light horse, and after initial training was posted a private, service number 335, to B Squadron of the 1st Light Horse Regiment. The unit sailed from Sydney on 20 October, aboard HMAT A16 Star of Victoria.

After training in Egypt, the regiment landed at Gallipoli on 12 May 1915. Monaghan was killed at Pope's Hill on 29 June, the only man from the regiment to die that day. He is buried in the Shrapnel Valley Cemetery.

Monaghan had named his eldest sister, Margaret Julia Sullivan (later Mrs McLeod) as his next of kin. After his death she conducted a brisk, and increasingly acrimonious correspondence with army authorities as she sought to have her brother's true surname recorded, and her rights as her brother's next of kin acknowledged. Sullivan's mother had died in 1897, and by 1914 his father, Patrick, was seriously ill. As a result, with the approval of his sisters, William Sullivan enlisted using the name Monaghan to avoid potential distress to his father in case he should be listed in a press release as being wounded or killed. In the event this precaution was unnecessary as Patrick Sullivan died later in 1914. While army authorities agreed to record Sullivan's true name on his service record, they insisted on adhering to the regulation which stated that medals and next of kin plaques bear the name under which a man had enlisted. Mrs McLeod was so distressed by this ruling that she wrote that she would rather not accept her brother's incorrectly named medals and plaque. After reluctantly providing the name of another brother, Peter, who had a superior claim to being William's legal next of kin but who could not be located, she was persuaded to accept both medals and plaque.

This commemorative plaque was sent to Mrs McLeod in January 1923.