stephen of perm had been a monk at rostov; sergii had founded trinity monastery. epiphanius wrote hagiographies of both st. stephen of perm and st. sergius. the latter, "life of our holy and godbearing father sergii thaumaturgus", he started to write a year after the death of saint sergius according to his own memories, and his recollection of the accounts of other contemporaries. he finished the writings 26 years after the death of sergius, i.e., around 1417-1418. there was a rewriting of the work by pachomius the serb (пахомий серб), which is usually more readily available.