The Uncle of Elfrida was the Mother (Father of Frederic; in other words, they were first cousins by the Father's side.

Being both born in one day & both brought up at one school, it was not wonderfull that they should look on each other with something more than bare po:
:litenneſs. They loved with mutual sin:
:cerity but were both determined not to transgreſs the rules of Propriety by owning their attachment, either to the object beloved or . to any one else.