On 13 Apr 1685 Margaret Wilson (age 18), Agnes Wilson and Margaret McLachlan were indicted as being guilty of conventicles. They were found guilty on all charges, and sentenced to be "tied to palisades fixed in the sand, within the floodmark of the sea, and there to stand till the flood o'erflowed them". Agnes Wilson was subsequently granted freedom on a bond of 100 Pounds Scots. Reprieves were written out for the two Margarets with a date of 30 Apr 1685.

Some Remarkable Passages of the Life and Death of Mr Alexander Peden Chapter 24. The broth was hell-hot in these days; they 'wanted long-shanked spoons that supped with the devil:' I could give many instances, but at this time shall only mention the drowning of these two women at Wigtoun in Galloway, the 11th of May 1685, (which some deny to be matter of fact) viz. Margaret Lauchlan, who was past sixty-three years, and some of her intimates said to me. She was a christian of deep exercise through much of her life, and of high attainments and great experiences in the ways of godliness; and Margaret Wilson (age 18) who was put to death with her, aged twenty-three. The old woman was first tied to the stake, enemies saying, 'Tis needless to speak to that old damn'd bitch, let her go to hell: but,' say they, 'Margaret, ye are young; if ye'll pray for the king, we will give you your life.' She said, 'I'll pray for salvation to all the elect, but the damnation of none.' They dashed her under the water, and pulled her up again. People looking on said, 'O Margaret, will ye say it I' She said, 'Lord, give him repentance, forgiveness and salvation, if it be thy holy will.' Lagg (age 30) cry'd, 'Damn'd bitch, we do not want such prayers: tender the oaths to her.' She said, ' No, no sinful oaths for me ' They said, 'To hell with them, to hell with them, it is o'er good for them.' Thus suffered they that extraordinary and unheard-of death.