This article aims to show that we do not know what we believe we do ab
out the extent and meaning of recourse to cohabitation among popular c
lasses in Paris in the first half of the nineteenth century. Discourse
on cohabitation and illegitimacy is deconstructed, revealing that ana
lyses of popular behavior are based on problematic data and flawed met
hods. If cohabitation was widespread, this was because of the legal an
d economic constraints imposed on workers, particularly migrants, rath
er than a symptom of cultural breakdown or the emergence of a counterc
ulture. The article interrogates serial data, and especially marriage
records, as well as the archives of charity organizations, to argue th
at Parisian workers were anxious to marry, to marry in church, and to
marry respectably. It suggests that we should dedramatize cohabitation
and recognize that popular-class attitudes and behavior were more con
formist and traditional than we have been led to think.