[IDEM libro trigensimo septimo quaestionum. ] §46.1.50.prDebitori creditor pro parte heres extitit accepto coherede fideiussore: quod ad ipsius quidem portionem attinet, obligatio ratione confusionis intercidit aut (quod est uerius) solutionis potestate: sed pro parte coheredis obligatio salua est non fideiussoria, sed hereditaria, quoniam maior tollit minorem.
[The same, in the thirty-seventh book of Questions.] A creditor became heir to his debtor for a share, with the surety being accepted as a co-heir. As far as his own share is concerned, the obligation is extinguished by reason of merger (confusio) or, what is more true, by the power of payment. But for the share of the co-heir, the obligation remains intact, not as a surety's obligation, but as an inherited one, since the greater extinguishes the lesser.