femme sole customs that existed in some medieval English towns. This granted them independent commercial and legal rights as if they were single. This practice is outlined in the custumal of Henry Darcy, Lord Mayor of London in the 1330s, allowing married women working independently of their husband to act as a single woman in all matters concerning her craft, such as renting a shop and suing and being sued for debt. The custom is known to have been adopted in a number of other towns, including Bristol, Lincoln, York, Sandwich, Rye, Carlisle, Chester and Exeter. Some North American British colonies also adopted this custom in the eighteenth century. However, it is unclear how many women took up this status, the extent to which it was legally enforced, or whether the legal and commercial independence it offered were advantageous. According to Chernock, "coverture, ... [a 1777] author ... concluded, was the product of foreign Norman invasion in the eleventh century—not, as Blackstone would have it, a time-tested 'English' legal practice. This was a reading of British history, then, that put a decidedly feminist twist on the idea of the 'Norman yoke. Also according to Chernock, "the Saxons, ... [Calidore] boasted, had encouraged women to 'retain separate property'— ... a clear blow to coverture." Chernock claims that "as the historical accounts of the laws regarding women had indicated, coverture was a policy not just foreign in its origins but also suited to particular and now remote historical conditions." Coverture may not have existed in "the Anglo-Saxon constitution". Coverture also held sway in English-speaking colonies because of the influence of the English common law there. The way in which coverture operated across the common law world has been the subject of recent studies examining the subordinating effects of marriage for women across medieval and early modern England and North America, in a variety of legal contexts. It has been argued that in practice, most of the rules of coverture "served not to guide every transaction but rather to provide clarity and direction in times of crisis or death." Despite this flexibility, coverture remained a powerful tool of marital inequality for many centuries. Criticism Early feminist historian Mary Ritter Beard held the view that much of the severity of the doctrine of coverture was actually due to Blackstone and other late systematizers rather than due to a genuine old common-law tradition. In March