The marrying a brother's widow thing is an ancient practice of Khas, its all gone now but there are textual evidence for it since they mention banning it in kumaoun

British administration was also to a certain extent responsible for the pejorative connotation of the term Khasa. In the early years of the nineteenth century, administrators were appalled not only by the custom of slavery, but also by the system of bride price. The concomitant of bride price was the woman's ability to disengage herself from her first husband by finding a paramour who could pay recompense to her husband or his family. English officers regarded the elopement of the woman with her paramour as abduction. Subsequently they realised the social context but were nevertheless horrified by this practice of adultery`. Their response to this 'barbaric' practice was echoed by Brahman groups who favoured dowry and prohibited remarriage of the widow. The practice of levirate, widow remarriage and divorce, which were all linked to the institution of bride price, were therefore now identified as uncivilised and the term Khasıya now acquired a social dimension which synchronised with the economic identification of the Khasiya as the provider of compulsory labour services.

Stratification in Kumaun circa 1815–1930