"The Devil's Law Case" partakes of a set of relationships with other plays of its era, centring on a plot twist involving a child's legitimacy and a mother's fidelity; some of the plays involved can be dated with some accuracy, while others cannot.The Fletcher/Massinger collaboration "The Spanish Curate" dates from 1622; "The Fair Maid of the Inn," in which Webster collaborated with Fletcher, Massinger, and John Ford, dates from the mid-1620s, after the publication of "The Devil's Law Case."