She found work as a servant in various houses and by January 1680, she was serving the family of Peter Delanoy, a prosperous dyer who lived in Southwark, in London.
Three fires were started in the Southwark house; they were put out by local people and Clark was arrested on the night after arousing suspicions by acting strangely.
She claimed that she had been approached by John Satterthwayt in late January and he had asked her to let him into the house in order to set it on fire.
[3] As she stood on the scaffold awaiting her execution, Clark announced to the onlookers that she had written a pamphlet arguing her case, claiming that her culpability was limited.
Both texts expanded upon Clark's argument that she had been bribed by Satterthwayt as part of a Catholic plot to burn down London.