Thanks, Sancti.
Short bio about him seems to have his middle name wrong:
"Robert Walter Campbell served with the Royal Scots Fusiliers during the Boer War and then retired to the Special Reserve. In 1914 he rejoined his regiment and served with the 5th battalion, a Territorial Army formation recruited from Ayrshire. With them he served in Gallipoli, an experience which gave him the background for his first war novel The Kangaroo Marines (1915). In 1916 he was transferred once more to the reserve and served for the rest of the war in an administrative capacity. His next novel Private Spud Tamson was published in 1916 and quickly went through several editions. Campbell repeated the formula, less successfully, in Sergeant Spud Tamson VC and his hero reappeared in 1926 to save a mining village in Spud Tamson's Pit. After the war Campbell lived in Lochmaben and Edinburgh but he vanished from the literary scene in the late 1920s and little is known about his subsequent life and career. He was also well known for his jaunty war poems which were published in The Making of Micky McGhee (1916). Campbell described the men of the 'Glesca Mileeshy' who took part in the trench fighting as 'a noble force, recruited from the Weary Willies and Never-works of the famous town of Glasgow.'"
