 Although Clinch believed that the evidence pointed to the twins having genuinely existed but that they had lived in the 16th century , rather than the early 12th century as generally claimed , they are not mentioned in any journals or books from the period . This points against their having lived in the 16th century ; the case of <unk> and <unk> <unk> <unk> ( 1617 – after 1646 ) had prompted great interest in conjoined twins , and conjoined sisters surviving to adulthood in south east England would have been widely noted . 
