133. The interrogative and relative pronouns were confused and combined
in Vulgar Latin, _quī_ taking the place of _quĭs_, and _quĭd_ gradually
encroaching on _quŏd_. Furthermore, the masculine forms were used
instead of the feminine, which disappeared. We have in Provençal no
evidence of the survival of any other cases than the nominative,
dative, and accusative singular and the nominative plural:--