I have a book of Tannahill's poems published in Paisley, my home town, in 1874 and the poem 'The Soldier's Adieu' appears as an eight liner only:

The weary sun's gane doun the west,
The birds sit nodding on the tree,
All Nature now inclines for rest,
But rest allow'd there's nane for me:
The trumpet calls to War's alarms,
The rattling drum forbids my stay;
Ah! Nancy, bless thy soldier's arms,
For ere morn I will be far away.