Margaret "Peggy" Thompson, later Margaret Neilson, was the housekeeper at Coilsfield House or Montgomery Castle in Ayrshire, Scotland. She married John Neilsen of Monyfee. The couple lived at Minnybae Farm near Kirkoswald. She was the 'charming Fillette' of Robert Burns fame and her husband was an old acquaintance of the poet.

Robert Burns, also known familiarly as Rabbie Burns, was a Scottish poet and lyricist. He is widely regarded as the national poet of Scotland and is celebrated worldwide. He is the best known of the poets who have written in the Scots language, although much of his writing is in a "light Scots dialect" of English, accessible to an audience beyond Scotland. He also wrote in standard English, and in these writings his political or civil commentary is often at its bluntest.