nie ces ▁to ▁marry ▁their ▁a un ts / un cles ▁— ▁an ▁opinion ▁that ▁Bon if ace ▁( right ly ) ▁believed ▁Gregory ▁would ▁not ▁have ▁held . ▁ ▁Bon if ace ▁seems ▁to ▁have ▁been ▁unable ▁to ▁correct ▁his ▁misunder standing ▁of ▁the ▁meaning ▁of ▁the ▁Lib ell us ▁on ▁this ▁point . ▁But ▁this ▁was ▁perhaps ▁due ▁as ▁much ▁to ▁the ▁fact ▁that ▁sevent h - ▁and ▁e ighth - century ▁canonical ▁authorities ▁( es pecially ▁pop es ) ▁so ▁frequently ▁conflic ted ▁on ▁this ▁subject , ▁as ▁to ▁Bon if ace ' s ▁own ▁interpret ative ▁error . ▁In ▁a ▁long ▁series ▁of ▁letters ▁written ▁to ▁subsequent ▁b ish ops ▁of ▁Rome ▁— ▁Pope ▁Gregory ▁II , ▁Pope ▁Gregory ▁III , ▁Pope ▁Zach ary ▁— ▁Bon if ace ▁period ically ▁brought ▁up ▁the ▁issue ▁of ▁cons angu inity ▁and ▁marriage , ▁and ▁each ▁time ▁he ▁received ▁a ▁slightly ▁different ▁answer ▁as ▁to ▁what ▁was ▁permitted ▁and ▁what ▁was ▁prohib ited . ▁Sus p icion ▁about ▁the ▁authentic ity ▁of ▁the ▁Lib ell us ▁seems ▁to ▁have ▁ended ▁with ▁Bon if ace ' s ▁death ▁in ▁ 7 5 4 , ▁though ▁mis inter pret ation ▁of ▁its ▁chapter ▁on ▁cons angu inity ▁continued ▁for ▁long ▁after ▁that . ▁Nevertheless , ▁no ▁medieval ▁authority ▁except ▁Bon if ace ▁is ▁on ▁record ▁as ▁ever ▁having ▁question ed ▁the ▁authentic ity ▁of ▁the ▁Lib ell us ▁and ▁its ▁marriage ▁chapter . ▁In ▁fact , ▁there ▁arose ▁a ▁vig orous ▁tradition ▁of ▁for