Picture a pedlar at a country market, pack open, shouting his wares to anyone who will listen. Burns borrows that figure for a piece of election mudslinging. The title tells us this is the fourth in a series of ballads on Mr. Heron's election, but Heron never appears in the text. The poem attacks instead, and the speaker's "troggin" (a pedlar's odds and ends, junk) is the reputation of a whole circle of local worthies. Their names are really place names: Broughton, Balmaghie, Cardoness, Buittle, Urr, Collieston. Judging by the poem's logic, these are men of standing on the opposing side, each reduced to a bargain-bin item.
The central idea is that these men's honour is not worth having, and the poem makes the point by turning abstract virtues into physical goods. Fame, worth, reputation, truth, conscience and wisdom are all laid out on the stall, and all are damaged. A noble Earl's "fame and high renown" is sold "for an auld sang", with the sly aside that "the gudes were stown", stolen. "Buittle's scrap o' truth" is a "wadset", a pledge or mortgage, but it has been "Pawn'd in a gin-shop, quenching holy drouth". Truth has been hocked for drink, and the word "holy" hints at a minister who should know better. The opening couplet sets up the irony: this is "Broken trade", yet it is "a' in high repair". The speaker's cheerful sales voice never admits the goods are rubbish, so the reader has to see it.
The form suits the joke. The poem is built from rhymed couplets, each opening with a "Here's…" or "Here is…" that mimics a seller holding up the next item. After each couplet comes the chorus, "Buy braw troggin frae the banks o' Dee", like a street cry. The rhythm is a long, rolling line with a strong beat on its first syllable, which sounds like a patter that never pauses for breath. Most of the rhymes are clean, such as ware/repair, e'e/Balmaghie and slack/pack. A few are looser, like names/crimes, and that slight roughness suits a hurried market voice. The Scots keeps everything earthy and local, with "wale" for the pick of the bunch, "soger" for soldier and "tint" for lost.
The best insults rely on small, vivid images. "Here's the worth o' Broughton in a needle's e'e" shrinks a man's value into something almost too tiny to see, and it may echo the biblical camel and the needle's eye. Collieston's "worth and wisdom" were nearly lost to "a thievish midge", so even a gnat could carry off the whole stock. Cardoness gets "stuff and lining" for a head, "Fine for a soger, a' the wale o' lead", meaning stupid and heavy, good for nothing but bullets. The "manse o' Urr" supplies a coat of arms whose crest is "a sour crab-apple, rotten at the core", a fine parody of heraldic pride. Satan appears too, as a "bizzard gled" (a buzzard kite) pouncing on Redcastle, who sprawls "like a taed". The proud are made small, sour or ridiculous in a single line.
The ending has the neatest twist. The speaker asks, "Saw ye e'er sic troggin?" and warns that if no one buys, "Hornie's turnin chapman—he'll buy a' the pack." Hornie is the devil, and the only customer for this stock is hell. A joke about shoddy goods becomes a verdict on moral worth, and the chorus keeps its cheerful tone while it condemns.
The poem is worth reading because it shows political satire working in a popular, singable form. It could be performed aloud and remembered, and it makes enemies laughable rather than merely wicked. It also keeps reminding us that a reputation can be treated like merchandise, valued, bartered and sold off cheap.