Barbados to Virginia, colonists long preferred English or Irish indentured servants as their main source of field labor; during most of the seventeenth century they showed few scruples about reducing their less fortunate countrymen to a status little different from chattel slaves – a degradation that was being carried out in a more extreme and far more extensive way with respect to the peasantry in contemporary Russia. The prevalence and suffering of white slaves, serfs and indentured servants in the early modern period suggests that there was nothing inevitable about limiting plantation slavery to people of African origin. Between 50 and 67 percent of white immigrants to the American colonies, from the 1630s and American Revolution, had traveled under indenture. Many women brought to the colonies were poor, some were abandoned or young girls born out of wedlock, others prostitutes or criminals. One ship's captain reportedly described them as a "villainous and demoralized lot". Many were transported against their will and for profit to Virginia and Maryland. The French transported women from the Salpêtrière prison for the homeless, insane and criminal to New Orleans. Women held at Salpêtrière were bound in chains, flogged and lived in generally poor and unsanitary conditions. Female inmates, some of whom were sick with venereal disease, were forced to attend confessions three times each day where they would be whipped if their demeanor and behaviors were not acceptably penitent. In addition to Salpêtrière, the French transported women from other almshouses and hospitals including Bicêtre, Hôpital général de Paris and Pitié. White slave traffic The International Agreement for the suppression of the White Slave Traffic is a series of anti–human trafficking treaties, the first of which was first negotiated in Paris in 1904. It was one of the first multilateral treaties to address issues of slavery and human trafficking. The Slavery, Servitude, Forced Labour and Similar Institutions and Practices Convention of 1926 and the International Convention for the Suppression of the Traffic in Women of Full Age of 1933 are similar documents. White Slave Traffic Act of 1910 In 1910 the US Congress passed the White Slave Traffic Act (better known as the Mann Act), which made it a felony to transport women across state borders for the purpose of "prostitution or debauchery, or for any other immoral purpose." The Act was applied to a wide variety of offences, many of which were consensual in nature.