After his death, Boisil appeared twice in a vision to a monk he had known, concerning the future Bishop Ecgberht of Ripon, who was instructed to concentrate on existing monasteries rather than missionary activity on the Continent. He is believed, on somewhat dubious authority, to have written certain theological works, but they have not been preserved. St Boswells in Roxburghshire commemorates his name.
After Boisil's passing, the monk he had known appeared to him twice in a vision, instructing Bishop Ecgberht of Ripon to prioritize existing monasteries over missionary activities on the Continent. It is believed that he wrote certain theological works, though these have not been preserved. St Boswells in Roxburghshire commemorates his name.